28989120 has 56 divisors (see below), whose sum is σ = 92043504. Its totient is φ = 7730176.

The previous prime is 28989113. The next prime is 28989137. The reversal of 28989120 is 2198982.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14139 + ... + 16058.

It is an arithmetic number, because the mean of its divisors is an integer number (1643634).

Almost surely, 2^28989120 is an apocalyptic number.

28989120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28989120 is an abundant number, since it is smaller than the sum of its proper divisors (63054384).

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

28989120 is a wasteful number, since it uses less digits than its factorization.

28989120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30217 (or 30207 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 28989120 is about 5384.1545297289. The cubic root of 28989120 is about 307.1932561454.

The spelling of 28989120 in words is "twenty-eight million, nine hundred eighty-nine thousand, one hundred twenty".