57235540 has 12 divisors (see below), whose sum is σ = 120194676. Its totient is φ = 22894208.

The previous prime is 57235511. The next prime is 57235547. The reversal of 57235540 is 4553275.

It can be written as a sum of positive squares in 2 ways, for example, as 41139396 + 16096144 = 6414^2 + 4012^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57235547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1430869 + ... + 1430908.

It is an arithmetic number, because the mean of its divisors is an integer number (10016223).

Almost surely, 2^57235540 is an apocalyptic number.

It is an amenable number.

57235540 is an abundant number, since it is smaller than the sum of its proper divisors (62959136).

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

57235540 is a wasteful number, since it uses less digits than its factorization.

57235540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861786 (or 2861784 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 57235540 is about 7565.4173711699. The cubic root of 57235540 is about 385.3794875199.

It can be divided in two parts, 57235 and 540, that added together give a palindrome (57775).

The spelling of 57235540 in words is "fifty-seven million, two hundred thirty-five thousand, five hundred forty".