57720286 has 16 divisors (see below), whose sum is σ = 95001984. Its totient is φ = 26136864.

The previous prime is 57720281. The next prime is 57720293. The reversal of 57720286 is 68202775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57720281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19566 + ... + 22321.

It is an arithmetic number, because the mean of its divisors is an integer number (5937624).

Almost surely, 2^57720286 is an apocalyptic number.

57720286 is a deficient number, since it is larger than the sum of its proper divisors (37281698).

57720286 is a wasteful number, since it uses less digits than its factorization.

57720286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41955.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 57720286 is about 7597.3867875737. The cubic root of 57720286 is about 386.4643976116.

The spelling of 57720286 in words is "fifty-seven million, seven hundred twenty thousand, two hundred eighty-six".