16445904 has 40 divisors (see below), whose sum is σ = 43032960. Its totient is φ = 5411328.

The previous prime is 16445893. The next prime is 16445969. The reversal of 16445904 is 40954461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1624 + ... + 5960.

It is an arithmetic number, because the mean of its divisors is an integer number (1075824).

Almost surely, 2^16445904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16445904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21516480).

16445904 is an abundant number, since it is smaller than the sum of its proper divisors (26587056).

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

16445904 is a wasteful number, since it uses less digits than its factorization.

16445904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4427 (or 4421 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 16445904 is about 4055.3549782972. The cubic root of 16445904 is about 254.3036441388.

The spelling of 16445904 in words is "sixteen million, four hundred forty-five thousand, nine hundred four".