28998880 has 24 divisors (see below), whose sum is σ = 68510232. Its totient is φ = 11599488.

The previous prime is 28998847. The next prime is 28998911. The reversal of 28998880 is 8889982.

It is a congruent number.

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, 90462 + ... + 90781.

It is an arithmetic number, because the mean of its divisors is an integer number (2854593).

Almost surely, 2^28998880 is an apocalyptic number.

28998880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28998880 is an abundant number, since it is smaller than the sum of its proper divisors (39511352).

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

28998880 is a wasteful number, since it uses less digits than its factorization.

28998880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181258 (or 181250 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 52.

The square root of 28998880 is about 5385.0608167411. The cubic root of 28998880 is about 307.2277273512.

The spelling of 28998880 in words is "twenty-eight million, nine hundred ninety-eight thousand, eight hundred eighty".