16405344 has 36 divisors (see below), whose sum is σ = 46653516. Its totient is φ = 5468352.

The previous prime is 16405343. The next prime is 16405349. The reversal of 16405344 is 44350461.

16405344 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16405343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28194 + ... + 28769.

It is an arithmetic number, because the mean of its divisors is an integer number (1295931).

Almost surely, 2^16405344 is an apocalyptic number.

It is an amenable number.

16405344 is an abundant number, since it is smaller than the sum of its proper divisors (30248172).

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

16405344 is a wasteful number, since it uses less digits than its factorization.

16405344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56979 (or 56968 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 16405344 is about 4050.3510958928. The cubic root of 16405344 is about 254.0944117584.

The spelling of 16405344 in words is "sixteen million, four hundred five thousand, three hundred forty-four".