87056220 has 48 divisors (see below), whose sum is σ = 248951808. Its totient is φ = 22720320.

The previous prime is 87056213. The next prime is 87056237. The reversal of 87056220 is 2265078.

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, 12616 + ... + 18255.

It is an arithmetic number, because the mean of its divisors is an integer number (5186496).

Almost surely, 2^87056220 is an apocalyptic number.

It is an amenable number.

87056220 is an abundant number, since it is smaller than the sum of its proper divisors (161895588).

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

87056220 is a wasteful number, since it uses less digits than its factorization.

87056220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30930 (or 30928 counting only the distinct ones).

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

The square root of 87056220 is about 9330.3922747117. The cubic root of 87056220 is about 443.2001874019.

The spelling of 87056220 in words is "eighty-seven million, fifty-six thousand, two hundred twenty".