16640528 has 20 divisors (see below), whose sum is σ = 33113580. Its totient is φ = 8095104.

The previous prime is 16640513. The next prime is 16640531. The reversal of 16640528 is 82504661.

It can be written as a sum of positive squares in 2 ways, for example, as 6091024 + 10549504 = 2468^2 + 3248^2 .

It is a super-3 number, since 3×16640528³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16640494 and 16640503.

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, 13463 + ... + 14646.

It is an arithmetic number, because the mean of its divisors is an integer number (1655679).

Almost surely, 2^16640528 is an apocalyptic number.

It is an amenable number.

16640528 is a deficient number, since it is larger than the sum of its proper divisors (16473052).

16640528 is a wasteful number, since it uses less digits than its factorization.

16640528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28154 (or 28148 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 16640528 is about 4079.2803286854. The cubic root of 16640528 is about 255.3028722161.

The spelling of 16640528 in words is "sixteen million, six hundred forty thousand, five hundred twenty-eight".