28169884 has 24 divisors (see below), whose sum is σ = 52390800. Its totient is φ = 13207296.

The previous prime is 28169881. The next prime is 28169887. The reversal of 28169884 is 48896182.

It is an interprime number because it is at equal distance from previous prime (28169881) and next prime (28169887).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28169881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23139 + ... + 24325.

It is an arithmetic number, because the mean of its divisors is an integer number (2182950).

Almost surely, 2^28169884 is an apocalyptic number.

It is an amenable number.

28169884 is a deficient number, since it is larger than the sum of its proper divisors (24220916).

28169884 is a wasteful number, since it uses less digits than its factorization.

28169884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557 (or 1555 counting only the distinct ones).

The product of its digits is 221184, while the sum is 46.

The square root of 28169884 is about 5307.5308760289. The cubic root of 28169884 is about 304.2717877560.

The spelling of 28169884 in words is "twenty-eight million, one hundred sixty-nine thousand, eight hundred eighty-four".