16402944 has 80 divisors (see below), whose sum is σ = 44684640. Its totient is φ = 5345280.

The previous prime is 16402931. The next prime is 16402949. The reversal of 16402944 is 44920461.

It is not an unprimeable number, because it can be changed into a prime (16402949) 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, 90534 + ... + 90714.

It is an arithmetic number, because the mean of its divisors is an integer number (558558).

Almost surely, 2^16402944 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 16402944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22342320).

16402944 is an abundant number, since it is smaller than the sum of its proper divisors (28281696).

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

16402944 is an equidigital number, since it uses as much as digits as its factorization.

16402944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 16402944 is about 4050.0548144439. The cubic root of 16402944 is about 254.0820203423.

The spelling of 16402944 in words is "sixteen million, four hundred two thousand, nine hundred forty-four".