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68643448 = 238580431
BaseRepresentation
bin1000001011101…
…10101001111000
311210011110002221
410011312221320
5120033042243
610451133424
71462313446
oct405665170
9153143087
1068643448
1135824925
121aba4274
13112b5233
14918bb96
15605dbed
hex4176a78

68643448 has 8 divisors (see below), whose sum is σ = 128706480. Its totient is φ = 34321720.

The previous prime is 68643401. The next prime is 68643451. The reversal of 68643448 is 84434686.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4290208 + ... + 4290223.

It is an arithmetic number, because the mean of its divisors is an integer number (16088310).

Almost surely, 268643448 is an apocalyptic number.

It is an amenable number.

68643448 is a deficient number, since it is larger than the sum of its proper divisors (60063032).

68643448 is a wasteful number, since it uses less digits than its factorization.

68643448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8580437 (or 8580433 counting only the distinct ones).

The product of its digits is 442368, while the sum is 43.

The square root of 68643448 is about 8285.1341570309. The cubic root of 68643448 is about 409.4488887315.

The spelling of 68643448 in words is "sixty-eight million, six hundred forty-three thousand, four hundred forty-eight".

Divisors: 1 2 4 8 8580431 17160862 34321724 68643448