57321400 has 48 divisors (see below), whose sum is σ = 137881800. Its totient is φ = 22135680.

The previous prime is 57321389. The next prime is 57321419. The reversal of 57321400 is 412375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 859 + ... + 10741.

Almost surely, 2^57321400 is an apocalyptic number.

57321400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57321400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68940900).

57321400 is an abundant number, since it is smaller than the sum of its proper divisors (80560400).

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

57321400 is a wasteful number, since it uses less digits than its factorization.

57321400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9928 (or 9919 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 57321400 is about 7571.0897498313. The cubic root of 57321400 is about 385.5720959991.

Adding to 57321400 its reverse (412375), we get a palindrome (57733775).

The spelling of 57321400 in words is "fifty-seven million, three hundred twenty-one thousand, four hundred".