28427624 has 8 divisors (see below), whose sum is σ = 53301810. Its totient is φ = 14213808.

The previous prime is 28427593. The next prime is 28427639. The reversal of 28427624 is 42672482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16662724 + 11764900 = 4082^2 + 3430^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1776719 + ... + 1776734.

Almost surely, 2^28427624 is an apocalyptic number.

It is an amenable number.

28427624 is a deficient number, since it is larger than the sum of its proper divisors (24874186).

28427624 is a wasteful number, since it uses less digits than its factorization.

28427624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3553459 (or 3553455 counting only the distinct ones).

The product of its digits is 43008, while the sum is 35.

The square root of 28427624 is about 5331.7561834728. The cubic root of 28427624 is about 305.1969488509.

The spelling of 28427624 in words is "twenty-eight million, four hundred twenty-seven thousand, six hundred twenty-four".