28240484 has 12 divisors (see below), whose sum is σ = 49484400. Its totient is φ = 14102088.

The previous prime is 28240469. The next prime is 28240489. The reversal of 28240484 is 48404282.

It is a self number, because there is not a number n which added to its sum of digits gives 28240484.

It is not an unprimeable number, because it can be changed into a prime (28240489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 674 + ... + 7545.

It is an arithmetic number, because the mean of its divisors is an integer number (4123700).

Almost surely, 2^28240484 is an apocalyptic number.

It is an amenable number.

28240484 is a deficient number, since it is larger than the sum of its proper divisors (21243916).

28240484 is a wasteful number, since it uses less digits than its factorization.

28240484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9082 (or 9080 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The square root of 28240484 is about 5314.1776409902. The cubic root of 28240484 is about 304.5257666421.

The spelling of 28240484 in words is "twenty-eight million, two hundred forty thousand, four hundred eighty-four".