56491900 has 18 divisors (see below), whose sum is σ = 122587640. Its totient is φ = 22596720.

The previous prime is 56491871. The next prime is 56491937. The reversal of 56491900 is 919465.

It is a super-3 number, since 3×56491900³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 282360 + ... + 282559.

Almost surely, 2^56491900 is an apocalyptic number.

56491900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

56491900 is an abundant number, since it is smaller than the sum of its proper divisors (66095740).

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

56491900 is a wasteful number, since it uses less digits than its factorization.

56491900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564933 (or 564926 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 56491900 is about 7516.1093658887. The cubic root of 56491900 is about 383.7031759298.

The spelling of 56491900 in words is "fifty-six million, four hundred ninety-one thousand, nine hundred".