28551884 has 12 divisors (see below), whose sum is σ = 50098944. Its totient is φ = 14237904.

The previous prime is 28551883. The next prime is 28551893. The reversal of 28551884 is 48815582.

It is a happy number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28551883) 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, 7787 + ... + 10850.

It is an arithmetic number, because the mean of its divisors is an integer number (4174912).

Almost surely, 2^28551884 is an apocalyptic number.

It is an amenable number.

28551884 is a deficient number, since it is larger than the sum of its proper divisors (21547060).

28551884 is a wasteful number, since it uses less digits than its factorization.

28551884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19024 (or 19022 counting only the distinct ones).

The product of its digits is 102400, while the sum is 41.

The square root of 28551884 is about 5343.3962982358. The cubic root of 28551884 is about 305.6409846762.

The spelling of 28551884 in words is "twenty-eight million, five hundred fifty-one thousand, eight hundred eighty-four".