57287320 has 32 divisors (see below), whose sum is σ = 129165120. Its totient is φ = 22867200.

The previous prime is 57287281. The next prime is 57287341. The reversal of 57287320 is 2378275.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22849 + ... + 25231.

It is an arithmetic number, because the mean of its divisors is an integer number (4036410).

Almost surely, 2^57287320 is an apocalyptic number.

It is an amenable number.

57287320 is an abundant number, since it is smaller than the sum of its proper divisors (71877800).

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

57287320 is a wasteful number, since it uses less digits than its factorization.

57287320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2995 (or 2991 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 57287320 is about 7568.8387484475. The cubic root of 57287320 is about 385.4956678701.

The spelling of 57287320 in words is "fifty-seven million, two hundred eighty-seven thousand, three hundred twenty".