16444240 has 20 divisors (see below), whose sum is σ = 38233044. Its totient is φ = 6577664.

The previous prime is 16444201. The next prime is 16444271. The reversal of 16444240 is 4244461.

It can be written as a sum of positive squares in 2 ways, for example, as 1882384 + 14561856 = 1372^2 + 3816^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102697 + ... + 102856.

Almost surely, 2^16444240 is an apocalyptic number.

16444240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16444240 is an abundant number, since it is smaller than the sum of its proper divisors (21788804).

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

16444240 is a wasteful number, since it uses less digits than its factorization.

16444240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205566 (or 205560 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 16444240 is about 4055.1498122757. The cubic root of 16444240 is about 254.2950670176.

The spelling of 16444240 in words is "sixteen million, four hundred forty-four thousand, two hundred forty".