56690320 has 40 divisors (see below), whose sum is σ = 136062720. Its totient is φ = 21943680.

The previous prime is 56690303. The next prime is 56690323. The reversal of 56690320 is 2309665.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (56690323) 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, 8950 + ... + 13909.

It is an arithmetic number, because the mean of its divisors is an integer number (3401568).

Almost surely, 2^56690320 is an apocalyptic number.

It is an amenable number.

56690320 is an abundant number, since it is smaller than the sum of its proper divisors (79372400).

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

56690320 is a wasteful number, since it uses less digits than its factorization.

56690320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22903 (or 22897 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 56690320 is about 7529.2974439851. The cubic root of 56690320 is about 384.1518858070.

Adding to 56690320 its reverse (2309665), we get a palindrome (58999985).

The spelling of 56690320 in words is "fifty-six million, six hundred ninety thousand, three hundred twenty".