68607640 has 32 divisors (see below), whose sum is σ = 155184480. Its totient is φ = 27297792.

The previous prime is 68607607. The next prime is 68607641. The reversal of 68607640 is 4670686.

It is a self number, because there is not a number n which added to its sum of digits gives 68607640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68607641) 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 7 ways as a sum of consecutive naturals, for example, 3277 + ... + 12163.

It is an arithmetic number, because the mean of its divisors is an integer number (4849515).

Almost surely, 2^68607640 is an apocalyptic number.

It is an amenable number.

68607640 is an abundant number, since it is smaller than the sum of its proper divisors (86576840).

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

68607640 is a wasteful number, since it uses less digits than its factorization.

68607640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9091 (or 9087 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 68607640 is about 8282.9728962493. The cubic root of 68607640 is about 409.3776797214.

The spelling of 68607640 in words is "sixty-eight million, six hundred seven thousand, six hundred forty".