56191620 has 24 divisors (see below), whose sum is σ = 157336704. Its totient is φ = 14984416.

The previous prime is 56191609. The next prime is 56191633. The reversal of 56191620 is 2619165.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468204 + ... + 468323.

It is an arithmetic number, because the mean of its divisors is an integer number (6555696).

Almost surely, 2^56191620 is an apocalyptic number.

It is an amenable number.

56191620 is an abundant number, since it is smaller than the sum of its proper divisors (101145084).

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

56191620 is a wasteful number, since it uses less digits than its factorization.

56191620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936539 (or 936537 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 56191620 is about 7496.1069896314. The cubic root of 56191620 is about 383.0221158096.

The spelling of 56191620 in words is "fifty-six million, one hundred ninety-one thousand, six hundred twenty".