15400980 has 144 divisors (see below), whose sum is σ = 56609280. Its totient is φ = 3308544.

The previous prime is 15400969. The next prime is 15400993. The reversal of 15400980 is 8900451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21061 + ... + 21779.

It is an arithmetic number, because the mean of its divisors is an integer number (393120).

Almost surely, 2^15400980 is an apocalyptic number.

15400980 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 15400980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28304640).

15400980 is an abundant number, since it is smaller than the sum of its proper divisors (41208300).

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

15400980 is a wasteful number, since it uses less digits than its factorization.

15400980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 15400980 is about 3924.4082356452. The cubic root of 15400980 is about 248.7994708136.

The spelling of 15400980 in words is "fifteen million, four hundred thousand, nine hundred eighty".