28813646540 has 48 divisors (see below), whose sum is σ = 69173056512. Its totient is φ = 9876063936.

The previous prime is 28813646489. The next prime is 28813646567. The reversal of 28813646540 is 4564631882.

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, 478817 + ... + 535623.

It is an arithmetic number, because the mean of its divisors is an integer number (1441105344).

Almost surely, 2^28813646540 is an apocalyptic number.

28813646540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28813646540 is an abundant number, since it is smaller than the sum of its proper divisors (40359409972).

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

28813646540 is a wasteful number, since it uses less digits than its factorization.

28813646540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60446 (or 60444 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 28813646540 in words is "twenty-eight billion, eight hundred thirteen million, six hundred forty-six thousand, five hundred forty".