15980394 has 16 divisors (see below), whose sum is σ = 31999968. Its totient is φ = 5320272.

The previous prime is 15980389. The next prime is 15980429. The reversal of 15980394 is 49308951.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8944 + ... + 10580.

It is an arithmetic number, because the mean of its divisors is an integer number (1999998).

Almost surely, 2^15980394 is an apocalyptic number.

15980394 is an abundant number, since it is smaller than the sum of its proper divisors (16019574).

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

15980394 is a wasteful number, since it uses less digits than its factorization.

15980394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3269.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 15980394 is about 3997.5484987677. The cubic root of 15980394 is about 251.8812428593.

The spelling of 15980394 in words is "fifteen million, nine hundred eighty thousand, three hundred ninety-four".