16390864 has 20 divisors (see below), whose sum is σ = 36294304. Its totient is φ = 7024608.

The previous prime is 16390837. The next prime is 16390867. The reversal of 16390864 is 46809361.

16390864 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

16390864 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16390867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73062 + ... + 73285.

Almost surely, 2^16390864 is an apocalyptic number.

16390864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16390864 is an abundant number, since it is smaller than the sum of its proper divisors (19903440).

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

16390864 is a wasteful number, since it uses less digits than its factorization.

16390864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146362 (or 146356 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 16390864 is about 4048.5632019273. The cubic root of 16390864 is about 254.0196318552.

The spelling of 16390864 in words is "sixteen million, three hundred ninety thousand, eight hundred sixty-four".