28253124 has 42 divisors (see below), whose sum is σ = 74138190. Its totient is φ = 9416736.

The previous prime is 28253119. The next prime is 28253143. The reversal of 28253124 is 42135282.

It can be written as a sum of positive squares in only one way, i.e., 24681024 + 3572100 = 4968^2 + 1890^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1929 + ... + 7760.

It is an arithmetic number, because the mean of its divisors is an integer number (1765195).

Almost surely, 2^28253124 is an apocalyptic number.

It is an amenable number.

28253124 is an abundant number, since it is smaller than the sum of its proper divisors (45885066).

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

28253124 is an equidigital number, since it uses as much as digits as its factorization.

28253124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9711 (or 9694 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 28253124 is about 5315.3667794424. The cubic root of 28253124 is about 304.5711935259.

The spelling of 28253124 in words is "twenty-eight million, two hundred fifty-three thousand, one hundred twenty-four".