16399500 has 144 divisors (see below), whose sum is σ = 53263392. Its totient is φ = 3897600.

The previous prime is 16399477. The next prime is 16399507. The reversal of 16399500 is 599361.

It is not an unprimeable number, because it can be changed into a prime (16399507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 565486 + ... + 565514.

Almost surely, 2^16399500 is an apocalyptic number.

16399500 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 16399500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26631696).

16399500 is an abundant number, since it is smaller than the sum of its proper divisors (36863892).

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

16399500 is a wasteful number, since it uses less digits than its factorization.

16399500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 16399500 is about 4049.6296126930. The cubic root of 16399500 is about 254.0642365484.

The spelling of 16399500 in words is "sixteen million, three hundred ninety-nine thousand, five hundred".