16879420728 has 96 divisors (see below), whose sum is σ = 45977686560. Its totient is φ = 5594261760.

The previous prime is 16879420669. The next prime is 16879420729. The reversal of 16879420728 is 82702497861.

It is a happy number.

It is a super-2 number, since 2×16879420728² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16879420729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12347101 + ... + 12348467.

It is an arithmetic number, because the mean of its divisors is an integer number (478934235).

Almost surely, 2^16879420728 is an apocalyptic number.

16879420728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16879420728 is an abundant number, since it is smaller than the sum of its proper divisors (29098265832).

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

16879420728 is a wasteful number, since it uses less digits than its factorization.

16879420728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237 (or 2230 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 16879420728 in words is "sixteen billion, eight hundred seventy-nine million, four hundred twenty thousand, seven hundred twenty-eight".