16398636 has 24 divisors (see below), whose sum is σ = 38330880. Its totient is φ = 5456592.

The previous prime is 16398623. The next prime is 16398643. The reversal of 16398636 is 63689361.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10285 + ... + 11771.

It is an arithmetic number, because the mean of its divisors is an integer number (1597120).

Almost surely, 2^16398636 is an apocalyptic number.

It is an amenable number.

16398636 is an abundant number, since it is smaller than the sum of its proper divisors (21932244).

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

16398636 is a wasteful number, since it uses less digits than its factorization.

16398636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413 (or 2411 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 16398636 is about 4049.5229348653. The cubic root of 16398636 is about 254.0597747181.

The spelling of 16398636 in words is "sixteen million, three hundred ninety-eight thousand, six hundred thirty-six".