28557344 has 24 divisors (see below), whose sum is σ = 58162860. Its totient is φ = 13785856.

The previous prime is 28557313. The next prime is 28557349. The reversal of 28557344 is 44375582.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27164944 + 1392400 = 5212^2 + 1180^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28557298 and 28557307.

It is not an unprimeable number, because it can be changed into a prime (28557349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14459 + ... + 16314.

Almost surely, 2^28557344 is an apocalyptic number.

It is an amenable number.

28557344 is an abundant number, since it is smaller than the sum of its proper divisors (29605516).

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

28557344 is a wasteful number, since it uses less digits than its factorization.

28557344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30812 (or 30804 counting only the distinct ones).

The product of its digits is 134400, while the sum is 38.

The square root of 28557344 is about 5343.9071848227. The cubic root of 28557344 is about 305.6604660924.

The spelling of 28557344 in words is "twenty-eight million, five hundred fifty-seven thousand, three hundred forty-four".