16400886 has 32 divisors (see below), whose sum is σ = 36246528. Its totient is φ = 4920960.

The previous prime is 16400851. The next prime is 16400927. The reversal of 16400886 is 68800461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1150 + ... + 5841.

It is an arithmetic number, because the mean of its divisors is an integer number (1132704).

Almost surely, 2^16400886 is an apocalyptic number.

16400886 is an abundant number, since it is smaller than the sum of its proper divisors (19845642).

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

16400886 is a wasteful number, since it uses less digits than its factorization.

16400886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7036.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 16400886 is about 4049.8007358387. The cubic root of 16400886 is about 254.0713937404.

The spelling of 16400886 in words is "sixteen million, four hundred thousand, eight hundred eighty-six".