56087220 has 48 divisors (see below), whose sum is σ = 179480448. Its totient is φ = 12819840.

The previous prime is 56087209. The next prime is 56087249. The reversal of 56087220 is 2278065.

It is a super-3 number, since 3×56087220³ (a number of 24 digits) contains 333 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66351 + ... + 67190.

It is an arithmetic number, because the mean of its divisors is an integer number (3739176).

Almost surely, 2^56087220 is an apocalyptic number.

It is an amenable number.

56087220 is an abundant number, since it is smaller than the sum of its proper divisors (123393228).

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

56087220 is a wasteful number, since it uses less digits than its factorization.

56087220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133560 (or 133558 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 56087220 is about 7489.1401375592. The cubic root of 56087220 is about 382.7847595447.

The spelling of 56087220 in words is "fifty-six million, eighty-seven thousand, two hundred twenty".