57220986 has 8 divisors (see below), whose sum is σ = 114441984. Its totient is φ = 19073660.

The previous prime is 57220939. The next prime is 57220991. The reversal of 57220986 is 68902275.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

57220986 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4768410 + ... + 4768421.

It is an arithmetic number, because the mean of its divisors is an integer number (14305248).

Almost surely, 2^57220986 is an apocalyptic number.

57220986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

57220986 is a wasteful number, since it uses less digits than its factorization.

57220986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9536836.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 57220986 is about 7564.4554331426. The cubic root of 57220986 is about 385.3468196557.

The spelling of 57220986 in words is "fifty-seven million, two hundred twenty thousand, nine hundred eighty-six".