102489980 has 12 divisors (see below), whose sum is σ = 215229000. Its totient is φ = 40995984.

The previous prime is 102489979. The next prime is 102490007. The reversal of 102489980 is 89984201.

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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2562230 + ... + 2562269.

It is an arithmetic number, because the mean of its divisors is an integer number (17935750).

Almost surely, 2^102489980 is an apocalyptic number.

102489980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102489980 is an abundant number, since it is smaller than the sum of its proper divisors (112739020).

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

102489980 is a wasteful number, since it uses less digits than its factorization.

102489980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5124508 (or 5124506 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 102489980 is about 10123.7335010361. The cubic root of 102489980 is about 467.9798308692.

The spelling of 102489980 in words is "one hundred two million, four hundred eighty-nine thousand, nine hundred eighty".