15998164 has 24 divisors (see below), whose sum is σ = 34458368. Its totient is φ = 6328800.

The previous prime is 15998161. The next prime is 15998197. The reversal of 15998164 is 46189951.

15998164 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

15998164 is strictly pandigital in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 15998164.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15998161) 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, 21612 + ... + 22339.

Almost surely, 2^15998164 is an apocalyptic number.

15998164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

15998164 is an abundant number, since it is smaller than the sum of its proper divisors (18460204).

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

15998164 is a wasteful number, since it uses less digits than its factorization.

15998164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43975 (or 43973 counting only the distinct ones).

The product of its digits is 77760, while the sum is 43.

The square root of 15998164 is about 3999.7704934158. The cubic root of 15998164 is about 251.9745712143.

The spelling of 15998164 in words is "fifteen million, nine hundred ninety-eight thousand, one hundred sixty-four".