57272420 has 24 divisors (see below), whose sum is σ = 120456504. Its totient is φ = 22873856.

The previous prime is 57272387. The next prime is 57272437. The reversal of 57272420 is 2427275.

57272420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2748964 + 54523456 = 1658^2 + 7384^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14144 + ... + 17736.

It is an arithmetic number, because the mean of its divisors is an integer number (5019021).

Almost surely, 2^57272420 is an apocalyptic number.

It is an amenable number.

57272420 is an abundant number, since it is smaller than the sum of its proper divisors (63184084).

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

57272420 is a wasteful number, since it uses less digits than its factorization.

57272420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399 (or 4397 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 57272420 is about 7567.8543854913. The cubic root of 57272420 is about 385.4622434666.

Adding to 57272420 its reverse (2427275), we get a palindrome (59699695).

The spelling of 57272420 in words is "fifty-seven million, two hundred seventy-two thousand, four hundred twenty".