57403320 has 128 divisors (see below), whose sum is σ = 191600640. Its totient is φ = 13662720.

The previous prime is 57403279. The next prime is 57403337. The reversal of 57403320 is 2330475.

It is a super-2 number, since 2×57403320² = 6590282294044800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47767 + ... + 48953.

It is an arithmetic number, because the mean of its divisors is an integer number (1496880).

Almost surely, 2^57403320 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 57403320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95800320).

57403320 is an abundant number, since it is smaller than the sum of its proper divisors (134197320).

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

57403320 is a wasteful number, since it uses less digits than its factorization.

57403320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245 (or 1241 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 57403320 is about 7576.4978717083. The cubic root of 57403320 is about 385.7556867181.

Adding to 57403320 its reverse (2330475), we get a palindrome (59733795).

The spelling of 57403320 in words is "fifty-seven million, four hundred three thousand, three hundred twenty".