15980120 has 64 divisors (see below), whose sum is σ = 39312000. Its totient is φ = 5810688.

The previous prime is 15980117. The next prime is 15980123. The reversal of 15980120 is 2108951.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15980117) and next prime (15980123).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 15980120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15980123) 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, 40886 + ... + 41274.

It is an arithmetic number, because the mean of its divisors is an integer number (614250).

Almost surely, 2^15980120 is an apocalyptic number.

15980120 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 15980120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19656000).

15980120 is an abundant number, since it is smaller than the sum of its proper divisors (23331880).

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

15980120 is a wasteful number, since it uses less digits than its factorization.

15980120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 15980120 is about 3997.5142276170. The cubic root of 15980120 is about 251.8798032649.

The spelling of 15980120 in words is "fifteen million, nine hundred eighty thousand, one hundred twenty".