28530944 has 36 divisors (see below), whose sum is σ = 61338396. Its totient is φ = 13166592.

The previous prime is 28530937. The next prime is 28530961. The reversal of 28530944 is 44903582.

It can be written as a sum of positive squares in 2 ways, for example, as 6553600 + 21977344 = 2560^2 + 4688^2 .

It is a super-2 number, since 2×28530944² = 1628029531062272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 959 + ... + 7614.

Almost surely, 2^28530944 is an apocalyptic number.

It is an amenable number.

28530944 is an abundant number, since it is smaller than the sum of its proper divisors (32807452).

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

28530944 is an equidigital number, since it uses as much as digits as its factorization.

28530944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8602 (or 8588 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 28530944 is about 5341.4365109023. The cubic root of 28530944 is about 305.5662471974.

The spelling of 28530944 in words is "twenty-eight million, five hundred thirty thousand, nine hundred forty-four".