28181679876 has 135 divisors (see below), whose sum is σ = 83250714183. Its totient is φ = 8037807120.

The previous prime is 28181679839. The next prime is 28181679893. The reversal of 28181679876 is 67897618182.

The square root of 28181679876 is 167874.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 49354671 + ... + 49355241.

Almost surely, 2^28181679876 is an apocalyptic number.

28181679876 is the 167874-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28181679876

28181679876 is an abundant number, since it is smaller than the sum of its proper divisors (55069034307).

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

28181679876 is an frugal number, since it uses more digits than its factorization.

28181679876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180 (or 583 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 63.

The spelling of 28181679876 in words is "twenty-eight billion, one hundred eighty-one million, six hundred seventy-nine thousand, eight hundred seventy-six".