16400079 has 12 divisors (see below), whose sum is σ = 23751000. Its totient is φ = 10904784.

The previous prime is 16400047. The next prime is 16400093. The reversal of 16400079 is 97000461.

It is not a de Polignac number, because 16400079 - 2⁵ = 16400047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16402079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1597 + ... + 5945.

It is an arithmetic number, because the mean of its divisors is an integer number (1979250).

Almost surely, 2^16400079 is an apocalyptic number.

16400079 is a deficient number, since it is larger than the sum of its proper divisors (7350921).

16400079 is a wasteful number, since it uses less digits than its factorization.

16400079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4774 (or 4771 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 16400079 is about 4049.7011000813. The cubic root of 16400079 is about 254.0672265067.

The spelling of 16400079 in words is "sixteen million, four hundred thousand, seventy-nine".