16397504 has 14 divisors (see below), whose sum is σ = 32538924. Its totient is φ = 8198720.

The previous prime is 16397467. The next prime is 16397509. The reversal of 16397504 is 40579361.

It is not an unprimeable number, because it can be changed into a prime (16397509) by changing a digit.

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 as a sum of consecutive naturals, namely, 128042 + ... + 128169.

Almost surely, 2^16397504 is an apocalyptic number.

It is an amenable number.

16397504 is a deficient number, since it is larger than the sum of its proper divisors (16141420).

16397504 is an equidigital number, since it uses as much as digits as its factorization.

16397504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256223 (or 256213 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 16397504 is about 4049.3831629027. The cubic root of 16397504 is about 254.0539286571.

The spelling of 16397504 in words is "sixteen million, three hundred ninety-seven thousand, five hundred four".