16163998 has 8 divisors (see below), whose sum is σ = 24292440. Its totient is φ = 8066520.

The previous prime is 16163977. The next prime is 16164007. The reversal of 16163998 is 89936161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×16163998² = 522549662688008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6388 + ... + 8551.

It is an arithmetic number, because the mean of its divisors is an integer number (3036555).

Almost surely, 2^16163998 is an apocalyptic number.

16163998 is a deficient number, since it is larger than the sum of its proper divisors (8128442).

16163998 is a wasteful number, since it uses less digits than its factorization.

16163998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15482.

The product of its digits is 69984, while the sum is 43.

The square root of 16163998 is about 4020.4474875317. The cubic root of 16163998 is about 252.8422206728.

It can be divided in two parts, 16163 and 998, that added together give a square (17161 = 131²).

The spelling of 16163998 in words is "sixteen million, one hundred sixty-three thousand, nine hundred ninety-eight".