28137324 has 12 divisors (see below), whose sum is σ = 65653784. Its totient is φ = 9379104.

The previous prime is 28137311. The next prime is 28137341. The reversal of 28137324 is 42373182.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 28137291 and 28137300.

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, 1172377 + ... + 1172400.

Almost surely, 2^28137324 is an apocalyptic number.

It is an amenable number.

28137324 is an abundant number, since it is smaller than the sum of its proper divisors (37516460).

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

28137324 is a wasteful number, since it uses less digits than its factorization.

28137324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344784 (or 2344782 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 28137324 is about 5304.4626495056. The cubic root of 28137324 is about 304.1545122893.

The spelling of 28137324 in words is "twenty-eight million, one hundred thirty-seven thousand, three hundred twenty-four".