68404056 has 128 divisors (see below), whose sum is σ = 212129280. Its totient is φ = 17934336.

The previous prime is 68404019. The next prime is 68404067. The reversal of 68404056 is 65040486.

It is a happy number.

68404056 is a nontrivial binomial coefficient, being equal to C(11697, 2).

It is a super-2 number, since 2×68404056² = 9358229754502272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122530 + ... + 123086.

It is an arithmetic number, because the mean of its divisors is an integer number (1657260).

Almost surely, 2^68404056 is an apocalyptic number.

68404056 is the 11696-th triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68404056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106064640).

68404056 is an abundant number, since it is smaller than the sum of its proper divisors (143725224).

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

68404056 is a wasteful number, since it uses less digits than its factorization.

68404056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 68404056 is about 8270.6744585916. The cubic root of 68404056 is about 408.9723540275.

The spelling of 68404056 in words is "sixty-eight million, four hundred four thousand, fifty-six".