28300832640 has 96 divisors (see below), whose sum is σ = 97726332600. Its totient is φ = 7546887168.

The previous prime is 28300832627. The next prime is 28300832687. The reversal of 28300832640 is 4623800382.

28300832640 is a `hidden beast` number, since 2 + 8 + 3 + 0 + 0 + 8 + 3 + 2 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28300832595 and 28300832604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2450910 + ... + 2462429.

Almost surely, 2^28300832640 is an apocalyptic number.

28300832640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28300832640 is an abundant number, since it is smaller than the sum of its proper divisors (69425499960).

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

28300832640 is a wasteful number, since it uses less digits than its factorization.

28300832640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4913364 (or 4913349 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 28300832640 in words is "twenty-eight billion, three hundred million, eight hundred thirty-two thousand, six hundred forty".