57272328 has 24 divisors (see below), whose sum is σ = 155112750. Its totient is φ = 19090752.

The previous prime is 57272321. The next prime is 57272329. The reversal of 57272328 is 82327275.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 41447844 + 15824484 = 6438^2 + 3978^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 57272292 and 57272301.

It is not an unprimeable number, because it can be changed into a prime (57272321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 397653 + ... + 397796.

Almost surely, 2^57272328 is an apocalyptic number.

It is an amenable number.

57272328 is an abundant number, since it is smaller than the sum of its proper divisors (97840422).

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

57272328 is a wasteful number, since it uses less digits than its factorization.

57272328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795461 (or 795454 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 57272328 is about 7567.8483071478. The cubic root of 57272328 is about 385.4620370697.

It can be divided in two parts, 57272 and 328, that added together give a square (57600 = 240²).

The spelling of 57272328 in words is "fifty-seven million, two hundred seventy-two thousand, three hundred twenty-eight".