15980427 has 12 divisors (see below), whose sum is σ = 23117640. Its totient is φ = 10637568.

The previous prime is 15980389. The next prime is 15980429. The reversal of 15980427 is 72408951.

15980427 is a `hidden beast` number, since 159 + 80 + 427 = 666.

It is not a de Polignac number, because 15980427 - 2²² = 11786123 is a prime.

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 junction number, because it is equal to n+sod(n) for n = 15980391 and 15980400.

It is not an unprimeable number, because it can be changed into a prime (15980429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10224 + ... + 11682.

It is an arithmetic number, because the mean of its divisors is an integer number (1926470).

Almost surely, 2^15980427 is an apocalyptic number.

15980427 is a deficient number, since it is larger than the sum of its proper divisors (7137213).

15980427 is a wasteful number, since it uses less digits than its factorization.

15980427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682 (or 2679 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 15980427 is about 3997.5526262952. The cubic root of 15980427 is about 251.8814162400.

The spelling of 15980427 in words is "fifteen million, nine hundred eighty thousand, four hundred twenty-seven".