57420280 has 32 divisors (see below), whose sum is σ = 135997200. Its totient is φ = 21758976.

The previous prime is 57420269. The next prime is 57420289. The reversal of 57420280 is 8202475.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57420289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37017 + ... + 38536.

Almost surely, 2^57420280 is an apocalyptic number.

It is an amenable number.

57420280 is an abundant number, since it is smaller than the sum of its proper divisors (78576920).

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

57420280 is a wasteful number, since it uses less digits than its factorization.

57420280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75583 (or 75579 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 57420280 is about 7577.6170396768. The cubic root of 57420280 is about 385.7936739067.

The spelling of 57420280 in words is "fifty-seven million, four hundred twenty thousand, two hundred eighty".