56921696 has 48 divisors (see below), whose sum is σ = 121356144. Its totient is φ = 26125824.

The previous prime is 56921687. The next prime is 56921699. The reversal of 56921696 is 69612965.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56921699) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 121655 + ... + 122121.

It is an arithmetic number, because the mean of its divisors is an integer number (2528253).

Almost surely, 2^56921696 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 56921696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60678072).

56921696 is an abundant number, since it is smaller than the sum of its proper divisors (64434448).

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

56921696 is a wasteful number, since it uses less digits than its factorization.

56921696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783 (or 775 counting only the distinct ones).

The product of its digits is 174960, while the sum is 44.

The square root of 56921696 is about 7544.6468439550. The cubic root of 56921696 is about 384.6738025236.

The spelling of 56921696 in words is "fifty-six million, nine hundred twenty-one thousand, six hundred ninety-six".