16388920 has 16 divisors (see below), whose sum is σ = 36875160. Its totient is φ = 6555552.

The previous prime is 16388917. The next prime is 16388921. The reversal of 16388920 is 2988361.

16388920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 16388920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16388921) 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, 204822 + ... + 204901.

Almost surely, 2^16388920 is an apocalyptic number.

16388920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16388920 is an abundant number, since it is smaller than the sum of its proper divisors (20486240).

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

16388920 is a wasteful number, since it uses less digits than its factorization.

16388920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409734 (or 409730 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 16388920 is about 4048.3231096344. The cubic root of 16388920 is about 254.0095889905.

The spelling of 16388920 in words is "sixteen million, three hundred eighty-eight thousand, nine hundred twenty".