68791040 has 72 divisors (see below), whose sum is σ = 166201728. Its totient is φ = 27279360.

The previous prime is 68791031. The next prime is 68791081. The reversal of 68791040 is 4019786.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285320 + ... + 285560.

Almost surely, 2^68791040 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 68791040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83100864).

68791040 is an abundant number, since it is smaller than the sum of its proper divisors (97410688).

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

68791040 is a wasteful number, since it uses less digits than its factorization.

68791040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 68791040 is about 8294.0364117841. The cubic root of 68791040 is about 409.7421341037.

The spelling of 68791040 in words is "sixty-eight million, seven hundred ninety-one thousand, forty".