15475980 has 48 divisors (see below), whose sum is σ = 46668384. Its totient is φ = 3809280.

The previous prime is 15475973. The next prime is 15475981. The reversal of 15475980 is 8957451.

It is a Smith number, since the sum of its digits (39) 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 (39).

It is not an unprimeable number, because it can be changed into a prime (15475981) 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, 9141 + ... + 10700.

It is an arithmetic number, because the mean of its divisors is an integer number (972258).

Almost surely, 2^15475980 is an apocalyptic number.

15475980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15475980 is an abundant number, since it is smaller than the sum of its proper divisors (31192404).

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

15475980 is a wasteful number, since it uses less digits than its factorization.

15475980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19866 (or 19864 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 15475980 is about 3933.9522111993. The cubic root of 15475980 is about 249.2026865349.

The spelling of 15475980 in words is "fifteen million, four hundred seventy-five thousand, nine hundred eighty".