16388900 has 72 divisors (see below), whose sum is σ = 39747456. Its totient is φ = 5814400.

The previous prime is 16388893. The next prime is 16388917. The reversal of 16388900 is 988361.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51542 + ... + 51858.

It is an arithmetic number, because the mean of its divisors is an integer number (552048).

Almost surely, 2^16388900 is an apocalyptic number.

16388900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16388900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19873728).

16388900 is an abundant number, since it is smaller than the sum of its proper divisors (23358556).

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

16388900 is a wasteful number, since it uses less digits than its factorization.

16388900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 16388900 is about 4048.3206394751. The cubic root of 16388900 is about 254.0094856647.

The spelling of 16388900 in words is "sixteen million, three hundred eighty-eight thousand, nine hundred".