16640272 has 20 divisors (see below), whose sum is σ = 35171856. Its totient is φ = 7563680.

The previous prime is 16640249. The next prime is 16640317. The reversal of 16640272 is 27204661.

It is a self number, because there is not a number n which added to its sum of digits gives 16640272.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47098 + ... + 47449.

Almost surely, 2^16640272 is an apocalyptic number.

It is an amenable number.

16640272 is an abundant number, since it is smaller than the sum of its proper divisors (18531584).

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

16640272 is a wasteful number, since it uses less digits than its factorization.

16640272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94566 (or 94560 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 16640272 is about 4079.2489504810. The cubic root of 16640272 is about 255.3015630054.

The spelling of 16640272 in words is "sixteen million, six hundred forty thousand, two hundred seventy-two".