56278220 has 24 divisors (see below), whose sum is σ = 118943664. Its totient is φ = 22366656.

The previous prime is 56278213. The next prime is 56278231. The reversal of 56278220 is 2287265.

It is a plaindrome in base 16.

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, 5822 + ... + 12101.

It is an arithmetic number, because the mean of its divisors is an integer number (4955986).

Almost surely, 2^56278220 is an apocalyptic number.

It is an amenable number.

56278220 is an abundant number, since it is smaller than the sum of its proper divisors (62665444).

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

56278220 is a wasteful number, since it uses less digits than its factorization.

56278220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18089 (or 18087 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 56278220 is about 7501.8810974315. The cubic root of 56278220 is about 383.2187803058.

The spelling of 56278220 in words is "fifty-six million, two hundred seventy-eight thousand, two hundred twenty".