15980980 has 24 divisors (see below), whose sum is σ = 34380360. Its totient is φ = 6236160.

The previous prime is 15980971. The next prime is 15980981. The reversal of 15980980 is 8908951.

It can be written as a sum of positive squares in 4 ways, for example, as 1281424 + 14699556 = 1132^2 + 3834^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15980981) 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, 8925 + ... + 10564.

It is an arithmetic number, because the mean of its divisors is an integer number (1432515).

Almost surely, 2^15980980 is an apocalyptic number.

15980980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15980980 is an abundant number, since it is smaller than the sum of its proper divisors (18399380).

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

15980980 is a wasteful number, since it uses less digits than its factorization.

15980980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19539 (or 19537 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 15980980 is about 3997.6217930164. The cubic root of 15980980 is about 251.8843216446.

The spelling of 15980980 in words is "fifteen million, nine hundred eighty thousand, nine hundred eighty".