15998412 has 24 divisors (see below), whose sum is σ = 37472176. Its totient is φ = 5312448.

The previous prime is 15998407. The next prime is 15998413. The reversal of 15998412 is 21489951.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (15998413) by changing a digit.

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, 918 + ... + 5730.

Almost surely, 2^15998412 is an apocalyptic number.

15998412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15998412 is an abundant number, since it is smaller than the sum of its proper divisors (21473764).

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

15998412 is a wasteful number, since it uses less digits than its factorization.

15998412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5097 (or 5095 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The square root of 15998412 is about 3999.8014950745. The cubic root of 15998412 is about 251.9758732255.

It can be divided in two parts, 1599 and 8412, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 15998412 in words is "fifteen million, nine hundred ninety-eight thousand, four hundred twelve".