28518772 has 12 divisors (see below), whose sum is σ = 52534720. Its totient is φ = 13508856.

The previous prime is 28518767. The next prime is 28518773. The reversal of 28518772 is 27781582.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28518773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187548 + ... + 187699.

Almost surely, 2^28518772 is an apocalyptic number.

It is an amenable number.

28518772 is a deficient number, since it is larger than the sum of its proper divisors (24015948).

28518772 is a wasteful number, since it uses less digits than its factorization.

28518772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375270 (or 375268 counting only the distinct ones).

The product of its digits is 62720, while the sum is 40.

The square root of 28518772 is about 5340.2969954863. The cubic root of 28518772 is about 305.5227869996.

The spelling of 28518772 in words is "twenty-eight million, five hundred eighteen thousand, seven hundred seventy-two".