28231552 has 16 divisors (see below), whose sum is σ = 56242800. Its totient is φ = 14115712.

The previous prime is 28231547. The next prime is 28231561. The reversal of 28231552 is 25513282.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 28231552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110152 + ... + 110407.

It is an arithmetic number, because the mean of its divisors is an integer number (3515175).

Almost surely, 2^28231552 is an apocalyptic number.

It is an amenable number.

28231552 is a deficient number, since it is larger than the sum of its proper divisors (28011248).

28231552 is an equidigital number, since it uses as much as digits as its factorization.

28231552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220573 (or 220561 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 28231552 is about 5313.3371810944. The cubic root of 28231552 is about 304.4936577618.

The spelling of 28231552 in words is "twenty-eight million, two hundred thirty-one thousand, five hundred fifty-two".