28312344 has 48 divisors (see below), whose sum is σ = 81193320. Its totient is φ = 8881920.

The previous prime is 28312321. The next prime is 28312351. The reversal of 28312344 is 44321382.

28312344 is a `hidden beast` number, since 2 + 8 + 312 + 344 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10342 + ... + 12789.

Almost surely, 2^28312344 is an apocalyptic number.

28312344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28312344 is an abundant number, since it is smaller than the sum of its proper divisors (52880976).

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

28312344 is a wasteful number, since it uses less digits than its factorization.

28312344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23160 (or 23153 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 28312344 is about 5320.9345043892. The cubic root of 28312344 is about 304.7838439780.

The spelling of 28312344 in words is "twenty-eight million, three hundred twelve thousand, three hundred forty-four".