28681413620 has 12 divisors (see below), whose sum is σ = 60230968644. Its totient is φ = 11472565440.

The previous prime is 28681413613. The next prime is 28681413647. The reversal of 28681413620 is 2631418682.

It can be written as a sum of positive squares in 2 ways, for example, as 12987337444 + 15694076176 = 113962^2 + 125276^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 717035321 + ... + 717035360.

It is an arithmetic number, because the mean of its divisors is an integer number (5019247387).

Almost surely, 2^28681413620 is an apocalyptic number.

28681413620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28681413620 is an abundant number, since it is smaller than the sum of its proper divisors (31549555024).

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

28681413620 is a wasteful number, since it uses less digits than its factorization.

28681413620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434070690 (or 1434070688 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 28681413620 in words is "twenty-eight billion, six hundred eighty-one million, four hundred thirteen thousand, six hundred twenty".