16872440 has 64 divisors (see below), whose sum is σ = 41549760. Its totient is φ = 6128640.

The previous prime is 16872439. The next prime is 16872451. The reversal of 16872440 is 4427861.

It is a junction number, because it is equal to n+sod(n) for n = 16872397 and 16872406.

It is a congruent number.

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, 36692 + ... + 37148.

It is an arithmetic number, because the mean of its divisors is an integer number (649215).

Almost surely, 2^16872440 is an apocalyptic number.

16872440 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 16872440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20774880).

16872440 is an abundant number, since it is smaller than the sum of its proper divisors (24677320).

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

16872440 is a wasteful number, since it uses less digits than its factorization.

16872440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 16872440 is about 4107.6075761932. The cubic root of 16872440 is about 256.4834208613.

The spelling of 16872440 in words is "sixteen million, eight hundred seventy-two thousand, four hundred forty".