16399488 has 64 divisors (see below), whose sum is σ = 49792320. Its totient is φ = 4684800.

The previous prime is 16399477. The next prime is 16399507. The reversal of 16399488 is 88499361.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

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 7 ways as a sum of consecutive naturals, for example, 363 + ... + 5738.

It is an arithmetic number, because the mean of its divisors is an integer number (778005).

Almost surely, 2^16399488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16399488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24896160).

16399488 is an abundant number, since it is smaller than the sum of its proper divisors (33392832).

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

16399488 is an equidigital number, since it uses as much as digits as its factorization.

16399488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6125 (or 6113 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 16399488 is about 4049.6281310757. The cubic root of 16399488 is about 254.0641745796.

The spelling of 16399488 in words is "sixteen million, three hundred ninety-nine thousand, four hundred eighty-eight".