56817980 has 24 divisors (see below), whose sum is σ = 125598480. Its totient is φ = 21530880.

The previous prime is 56817973. The next prime is 56817983. The reversal of 56817980 is 8971865.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56817983) 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, 74381 + ... + 75140.

It is an arithmetic number, because the mean of its divisors is an integer number (5233270).

Almost surely, 2^56817980 is an apocalyptic number.

It is an amenable number.

56817980 is an abundant number, since it is smaller than the sum of its proper divisors (68780500).

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

56817980 is a wasteful number, since it uses less digits than its factorization.

56817980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149549 (or 149547 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 56817980 is about 7537.7702273285. The cubic root of 56817980 is about 384.4400247362.

The spelling of 56817980 in words is "fifty-six million, eight hundred seventeen thousand, nine hundred eighty".