28494637860 has 96 divisors (see below), whose sum is σ = 85952805120. Its totient is φ = 7011574272.

The previous prime is 28494637849. The next prime is 28494637883. The reversal of 28494637860 is 6873649482.

It is a self number, because there is not a number n which added to its sum of digits gives 28494637860.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3219321 + ... + 3228159.

It is an arithmetic number, because the mean of its divisors is an integer number (895341720).

Almost surely, 2^28494637860 is an apocalyptic number.

28494637860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28494637860 is an abundant number, since it is smaller than the sum of its proper divisors (57458167260).

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

28494637860 is a wasteful number, since it uses less digits than its factorization.

28494637860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12997 (or 12995 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 57.

It can be divided in two parts, 284946 and 37860, that added together give a triangular number (322806 = T₈₀₃).

The spelling of 28494637860 in words is "twenty-eight billion, four hundred ninety-four million, six hundred thirty-seven thousand, eight hundred sixty".