28311744 has 28 divisors (see below), whose sum is σ = 74908664. Its totient is φ = 9437184.

The previous prime is 28311737. The next prime is 28311757. The reversal of 28311744 is 44711382.

It is a congruent number.

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, 73537 + ... + 73920.

It is the magic constant of a 384 × 384 magic square.

Almost surely, 2^28311744 is an apocalyptic number.

28311744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28311744 is an abundant number, since it is smaller than the sum of its proper divisors (46596920).

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

28311744 is a wasteful number, since it uses less digits than its factorization.

28311744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147472 (or 147462 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 28311744 is about 5320.8781230169. The cubic root of 28311744 is about 304.7816909525.

The spelling of 28311744 in words is "twenty-eight million, three hundred eleven thousand, seven hundred forty-four".