57291140 has 12 divisors (see below), whose sum is σ = 120311436. Its totient is φ = 22916448.

The previous prime is 57291121. The next prime is 57291149. The reversal of 57291140 is 4119275.

It can be written as a sum of positive squares in 2 ways, for example, as 15507844 + 41783296 = 3938^2 + 6464^2 .

It is not an unprimeable number, because it can be changed into a prime (57291149) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1432259 + ... + 1432298.

It is an arithmetic number, because the mean of its divisors is an integer number (10025953).

Almost surely, 2^57291140 is an apocalyptic number.

It is an amenable number.

57291140 is an abundant number, since it is smaller than the sum of its proper divisors (63020296).

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

57291140 is a wasteful number, since it uses less digits than its factorization.

57291140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864566 (or 2864564 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 57291140 is about 7569.0910947088. The cubic root of 57291140 is about 385.5042361462.

The spelling of 57291140 in words is "fifty-seven million, two hundred ninety-one thousand, one hundred forty".