16399494 has 24 divisors (see below), whose sum is σ = 35616360. Its totient is φ = 5453568.

The previous prime is 16399477. The next prime is 16399507. The reversal of 16399494 is 49499361.

16399494 is a `hidden beast` number, since 1 + 639 + 9 + 4 + 9 + 4 = 666.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 9597 + ... + 11175.

It is an arithmetic number, because the mean of its divisors is an integer number (1484015).

Almost surely, 2^16399494 is an apocalyptic number.

16399494 is an abundant number, since it is smaller than the sum of its proper divisors (19216866).

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

16399494 is a wasteful number, since it uses less digits than its factorization.

16399494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164 (or 2161 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 16399494 is about 4049.6288718844. The cubic root of 16399494 is about 254.0642055640.

The spelling of 16399494 in words is "sixteen million, three hundred ninety-nine thousand, four hundred ninety-four".