57539436 has 12 divisors (see below), whose sum is σ = 134258712. Its totient is φ = 19179808.

The previous prime is 57539423. The next prime is 57539437. The reversal of 57539436 is 63493575.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (57539437) 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, 2397465 + ... + 2397488.

It is an arithmetic number, because the mean of its divisors is an integer number (11188226).

Almost surely, 2^57539436 is an apocalyptic number.

It is an amenable number.

57539436 is an abundant number, since it is smaller than the sum of its proper divisors (76719276).

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

57539436 is a wasteful number, since it uses less digits than its factorization.

57539436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794960 (or 4794958 counting only the distinct ones).

The product of its digits is 340200, while the sum is 42.

The square root of 57539436 is about 7585.4753311839. The cubic root of 57539436 is about 386.0603501261.

It can be divided in two parts, 57539 and 436, that added together give a palindrome (57975).

The spelling of 57539436 in words is "fifty-seven million, five hundred thirty-nine thousand, four hundred thirty-six".