15015980 has 48 divisors (see below), whose sum is σ = 36261120. Its totient is φ = 5116608.

The previous prime is 15015971. The next prime is 15015989. The reversal of 15015980 is 8951051.

It is an interprime number because it is at equal distance from previous prime (15015971) and next prime (15015989).

It is not an unprimeable number, because it can be changed into a prime (15015989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39431 + ... + 39809.

It is an arithmetic number, because the mean of its divisors is an integer number (755440).

Almost surely, 2^15015980 is an apocalyptic number.

15015980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15015980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18130560).

15015980 is an abundant number, since it is smaller than the sum of its proper divisors (21245140).

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

15015980 is a wasteful number, since it uses less digits than its factorization.

15015980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 15015980 is about 3875.0458061809. The cubic root of 15015980 is about 246.7087542825.

The spelling of 15015980 in words is "fifteen million, fifteen thousand, nine hundred eighty".