15994992 has 40 divisors (see below), whose sum is σ = 44500624. Its totient is φ = 4921344.

The previous prime is 15994981. The next prime is 15994997. The reversal of 15994992 is 29949951.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15994997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12193 + ... + 13440.

Almost surely, 2^15994992 is an apocalyptic number.

15994992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15994992 is an abundant number, since it is smaller than the sum of its proper divisors (28505632).

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

15994992 is a wasteful number, since it uses less digits than its factorization.

15994992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25657 (or 25651 counting only the distinct ones).

The product of its digits is 262440, while the sum is 48.

The square root of 15994992 is about 3999.3739510078. The cubic root of 15994992 is about 251.9579168830.

The spelling of 15994992 in words is "fifteen million, nine hundred ninety-four thousand, nine hundred ninety-two".