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68152380 = 22351135873
BaseRepresentation
bin1000000111111…
…10110000111100
311202020111111020
410003332300330
5114421334010
610432424140
71455166662
oct403766074
9152214436
1068152380
113551998a
121a9a8050
131117286a
1490a0c32
155eb3470
hex40fec3c

68152380 has 24 divisors (see below), whose sum is σ = 190826832. Its totient is φ = 18173952.

The previous prime is 68152351. The next prime is 68152387. The reversal of 68152380 is 8325186.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68152387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567877 + ... + 567996.

It is an arithmetic number, because the mean of its divisors is an integer number (7951118).

Almost surely, 268152380 is an apocalyptic number.

68152380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68152380 is an abundant number, since it is smaller than the sum of its proper divisors (122674452).

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

68152380 is a wasteful number, since it uses less digits than its factorization.

68152380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135885 (or 1135883 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 68152380 is about 8255.4454755634. The cubic root of 68152380 is about 408.4701663683.

The spelling of 68152380 in words is "sixty-eight million, one hundred fifty-two thousand, three hundred eighty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 1135873 2271746 3407619 4543492 5679365 6815238 11358730 13630476 17038095 22717460 34076190 68152380