68640612 has 24 divisors (see below), whose sum is σ = 160482336. Its totient is φ = 22834368.

The previous prime is 68640589. The next prime is 68640613. The reversal of 68640612 is 21604686.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (68640613) 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, 808 + ... + 11744.

It is an arithmetic number, because the mean of its divisors is an integer number (6686764).

Almost surely, 2^68640612 is an apocalyptic number.

It is an amenable number.

68640612 is an abundant number, since it is smaller than the sum of its proper divisors (91841724).

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

68640612 is a wasteful number, since it uses less digits than its factorization.

68640612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11467 (or 11465 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 68640612 is about 8284.9630053489. The cubic root of 68640612 is about 409.4432498683.

The spelling of 68640612 in words is "sixty-eight million, six hundred forty thousand, six hundred twelve".