57285140 has 24 divisors (see below), whose sum is σ = 131235552. Its totient is φ = 20830880.

The previous prime is 57285127. The next prime is 57285167. The reversal of 57285140 is 4158275.

It is a junction number, because it is equal to n+sod(n) for n = 57285097 and 57285106.

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, 129974 + ... + 130413.

It is an arithmetic number, because the mean of its divisors is an integer number (5468148).

Almost surely, 2^57285140 is an apocalyptic number.

It is an amenable number.

57285140 is an abundant number, since it is smaller than the sum of its proper divisors (73950412).

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

57285140 is a wasteful number, since it uses less digits than its factorization.

57285140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260407 (or 260405 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 57285140 is about 7568.6947355538. The cubic root of 57285140 is about 385.4907779503.

The spelling of 57285140 in words is "fifty-seven million, two hundred eighty-five thousand, one hundred forty".