15997838 has 16 divisors (see below), whose sum is σ = 25116480. Its totient is φ = 7634016.

The previous prime is 15997819. The next prime is 15997841. The reversal of 15997838 is 83879951.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1883 + ... + 5961.

It is an arithmetic number, because the mean of its divisors is an integer number (1569780).

Almost surely, 2^15997838 is an apocalyptic number.

15997838 is a deficient number, since it is larger than the sum of its proper divisors (9118642).

15997838 is a wasteful number, since it uses less digits than its factorization.

15997838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171.

The product of its digits is 544320, while the sum is 50.

The square root of 15997838 is about 3999.7297408700. The cubic root of 15997838 is about 251.9728596789.

The spelling of 15997838 in words is "fifteen million, nine hundred ninety-seven thousand, eight hundred thirty-eight".