57550540 has 48 divisors (see below), whose sum is σ = 125752032. Its totient is φ = 22104576.

The previous prime is 57550523. The next prime is 57550553. The reversal of 57550540 is 4505575.

It is a super-3 number, since 3×57550540³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60952 + ... + 61888.

It is an arithmetic number, because the mean of its divisors is an integer number (2619834).

Almost surely, 2^57550540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57550540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62876016).

57550540 is an abundant number, since it is smaller than the sum of its proper divisors (68201492).

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

57550540 is a wasteful number, since it uses less digits than its factorization.

57550540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 17500, while the sum is 31.

The square root of 57550540 is about 7586.2072210031. The cubic root of 57550540 is about 386.0851825929.

It can be divided in two parts, 575 and 50540, that added together give a palindrome (51115).

The spelling of 57550540 in words is "fifty-seven million, five hundred fifty thousand, five hundred forty".