16390899 has 24 divisors (see below), whose sum is σ = 27252992. Its totient is φ = 9298800.

The previous prime is 16390879. The next prime is 16390903. The reversal of 16390899 is 99809361.

16390899 is a `hidden beast` number, since 1 + 639 + 0 + 8 + 9 + 9 = 666.

It is not a de Polignac number, because 16390899 - 2⁵ = 16390867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16390819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8652 + ... + 10374.

Almost surely, 2^16390899 is an apocalyptic number.

16390899 is a deficient number, since it is larger than the sum of its proper divisors (10862093).

16390899 is a wasteful number, since it uses less digits than its factorization.

16390899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887 (or 1884 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 16390899 is about 4048.5675244461. The cubic root of 16390899 is about 254.0198126608.

The spelling of 16390899 in words is "sixteen million, three hundred ninety thousand, eight hundred ninety-nine".