16940399 has 8 divisors (see below), whose sum is σ = 19387680. Its totient is φ = 14499936.

The previous prime is 16940389. The next prime is 16940411. The reversal of 16940399 is 99304961.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16940399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16940369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5897 + ... + 8285.

It is an arithmetic number, because the mean of its divisors is an integer number (2423460).

Almost surely, 2^16940399 is an apocalyptic number.

16940399 is a deficient number, since it is larger than the sum of its proper divisors (2447281).

16940399 is a wasteful number, since it uses less digits than its factorization.

16940399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3409.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 16940399 is about 4115.8715966366. The cubic root of 16940399 is about 256.8273151442.

The spelling of 16940399 in words is "sixteen million, nine hundred forty thousand, three hundred ninety-nine".