57405140 has 24 divisors (see below), whose sum is σ = 129824520. Its totient is φ = 21195648.

The previous prime is 57405109. The next prime is 57405157. The reversal of 57405140 is 4150475.

It can be written as a sum of positive squares in 4 ways, for example, as 4813636 + 52591504 = 2194^2 + 7252^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

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, 110135 + ... + 110654.

It is an arithmetic number, because the mean of its divisors is an integer number (5409355).

Almost surely, 2^57405140 is an apocalyptic number.

It is an amenable number.

57405140 is an abundant number, since it is smaller than the sum of its proper divisors (72419380).

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

57405140 is a wasteful number, since it uses less digits than its factorization.

57405140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220811 (or 220809 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 57405140 is about 7576.6179790194. The cubic root of 57405140 is about 385.7597635318.

The spelling of 57405140 in words is "fifty-seven million, four hundred five thousand, one hundred forty".