16399398 has 8 divisors (see below), whose sum is σ = 32798808. Its totient is φ = 5466464.

The previous prime is 16399393. The next prime is 16399421. The reversal of 16399398 is 89399361.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

16399398 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16399393) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1366611 + ... + 1366622.

It is an arithmetic number, because the mean of its divisors is an integer number (4099851).

Almost surely, 2^16399398 is an apocalyptic number.

16399398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16399398 is a wasteful number, since it uses less digits than its factorization.

16399398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733238.

The product of its digits is 314928, while the sum is 48.

The square root of 16399398 is about 4049.6170189291. The cubic root of 16399398 is about 254.0637098127.

The spelling of 16399398 in words is "sixteen million, three hundred ninety-nine thousand, three hundred ninety-eight".