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68012412 = 223134310139
BaseRepresentation
bin1000000110111…
…00100101111100
311201222101111020
410003130211330
5114402344122
610425424140
71454044626
oct403344574
9151871436
1068012412
1135433806
121a93b050
1311123c40
149065c16
155e86c5c
hex40dc97c

68012412 has 48 divisors (see below), whose sum is σ = 174894720. Its totient is φ = 20438208.

The previous prime is 68012411. The next prime is 68012507. The reversal of 68012412 is 21421086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68012411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1639 + ... + 11777.

It is an arithmetic number, because the mean of its divisors is an integer number (3643640).

Almost surely, 268012412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68012412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87447360).

68012412 is an abundant number, since it is smaller than the sum of its proper divisors (106882308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68012412 is a wasteful number, since it uses less digits than its factorization.

68012412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10202 (or 10200 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 68012412 is about 8246.9638049406. The cubic root of 68012412 is about 408.1903427511.

Adding to 68012412 its reverse (21421086), we get a palindrome (89433498).

The spelling of 68012412 in words is "sixty-eight million, twelve thousand, four hundred twelve".

Divisors: 1 2 3 4 6 12 13 26 39 43 52 78 86 129 156 172 258 516 559 1118 1677 2236 3354 6708 10139 20278 30417 40556 60834 121668 131807 263614 395421 435977 527228 790842 871954 1307931 1581684 1743908 2615862 5231724 5667701 11335402 17003103 22670804 34006206 68012412