16640264 has 16 divisors (see below), whose sum is σ = 31247100. Its totient is φ = 8307712.

The previous prime is 16640249. The next prime is 16640317. The reversal of 16640264 is 46204661.

It can be written as a sum of positive squares in 2 ways, for example, as 16337764 + 302500 = 4042^2 + 550^2 .

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, 6752 + ... + 8880.

Almost surely, 2^16640264 is an apocalyptic number.

It is an amenable number.

16640264 is a deficient number, since it is larger than the sum of its proper divisors (14606836).

16640264 is a wasteful number, since it uses less digits than its factorization.

16640264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112 (or 3108 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 16640264 is about 4079.2479699082. The cubic root of 16640264 is about 255.3015220924.

The spelling of 16640264 in words is "sixteen million, six hundred forty thousand, two hundred sixty-four".