16320504 has 64 divisors (see below), whose sum is σ = 42768000. Its totient is φ = 5183360.

The previous prime is 16320481. The next prime is 16320517. The reversal of 16320504 is 40502361.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91087 + ... + 91265.

It is an arithmetic number, because the mean of its divisors is an integer number (668250).

Almost surely, 2^16320504 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 16320504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21384000).

16320504 is an abundant number, since it is smaller than the sum of its proper divisors (26447496).

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

16320504 is a wasteful number, since it uses less digits than its factorization.

16320504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 16320504 is about 4039.8643541584. The cubic root of 16320504 is about 253.6556393226.

Adding to 16320504 its reverse (40502361), we get a palindrome (56822865).

The spelling of 16320504 in words is "sixteen million, three hundred twenty thousand, five hundred four".