16872720 has 80 divisors (see below), whose sum is σ = 52704960. Its totient is φ = 4465152.

The previous prime is 16872697. The next prime is 16872763. The reversal of 16872720 is 2727861.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54807 + ... + 55113.

It is an arithmetic number, because the mean of its divisors is an integer number (658812).

Almost surely, 2^16872720 is an apocalyptic number.

16872720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16872720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26352480).

16872720 is an abundant number, since it is smaller than the sum of its proper divisors (35832240).

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

16872720 is a wasteful number, since it uses less digits than its factorization.

16872720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 16872720 is about 4107.6416591519. The cubic root of 16872720 is about 256.4848396437.

The spelling of 16872720 in words is "sixteen million, eight hundred seventy-two thousand, seven hundred twenty".