15139980 has 144 divisors (see below), whose sum is σ = 50168160. Its totient is φ = 3788928.

The previous prime is 15139973. The next prime is 15139987. The reversal of 15139980 is 8993151.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15139973) and next prime (15139987).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (15139987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 285634 + ... + 285686.

It is an arithmetic number, because the mean of its divisors is an integer number (348390).

Almost surely, 2^15139980 is an apocalyptic number.

15139980 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 15139980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25084080).

15139980 is an abundant number, since it is smaller than the sum of its proper divisors (35028180).

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

15139980 is a wasteful number, since it uses less digits than its factorization.

15139980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 15139980 is about 3891.0127216446. The cubic root of 15139980 is about 247.3859897301.

The spelling of 15139980 in words is "fifteen million, one hundred thirty-nine thousand, nine hundred eighty".