16445864 has 32 divisors (see below), whose sum is σ = 31795200. Its totient is φ = 7970880.

The previous prime is 16445861. The next prime is 16445873. The reversal of 16445864 is 46854461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16445861) 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, 71702 + ... + 71930.

It is an arithmetic number, because the mean of its divisors is an integer number (993600).

Almost surely, 2^16445864 is an apocalyptic number.

It is an amenable number.

16445864 is a deficient number, since it is larger than the sum of its proper divisors (15349336).

16445864 is a wasteful number, since it uses less digits than its factorization.

16445864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 469 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 16445864 is about 4055.3500465435. The cubic root of 16445864 is about 254.3034379648.

The spelling of 16445864 in words is "sixteen million, four hundred forty-five thousand, eight hundred sixty-four".