16720732 has 12 divisors (see below), whose sum is σ = 33441520. Its totient is φ = 7166016.

The previous prime is 16720699. The next prime is 16720789. The reversal of 16720732 is 23702761.

16720732 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 597169 = 16720732 / (1 + 6 + 7 + 2 + 0 + 7 + 3 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 16720732.

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, 298557 + ... + 298612.

Almost surely, 2^16720732 is an apocalyptic number.

It is an amenable number.

16720732 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16720732 is a wasteful number, since it uses less digits than its factorization.

16720732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597180 (or 597178 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 16720732 is about 4089.0991672983. The cubic root of 16720732 is about 255.7123845051.

The spelling of 16720732 in words is "sixteen million, seven hundred twenty thousand, seven hundred thirty-two".