28365980 has 12 divisors (see below), whose sum is σ = 59568600. Its totient is φ = 11346384.

The previous prime is 28365959. The next prime is 28365989. The reversal of 28365980 is 8956382.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28365989) 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, 709130 + ... + 709169.

It is an arithmetic number, because the mean of its divisors is an integer number (4964050).

Almost surely, 2^28365980 is an apocalyptic number.

28365980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28365980 is an abundant number, since it is smaller than the sum of its proper divisors (31202620).

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

28365980 is a wasteful number, since it uses less digits than its factorization.

28365980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418308 (or 1418306 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 28365980 is about 5325.9722117187. The cubic root of 28365980 is about 304.9761873373.

The spelling of 28365980 in words is "twenty-eight million, three hundred sixty-five thousand, nine hundred eighty".