28364996834640 has 80 divisors (see below), whose sum is σ = 97701655771200. Its totient is φ = 7563999155328.

The previous prime is 28364996834623. The next prime is 28364996834717. The reversal of 28364996834640 is 4643869946382.

28364996834640 is a `hidden beast` number, since 2 + 8 + 3 + 6 + 499 + 68 + 34 + 6 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

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, 6565969330 + ... + 6565973649.

It is an arithmetic number, because the mean of its divisors is an integer number (1221270697140).

Almost surely, 2^{28364996834640} is an apocalyptic number.

28364996834640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28364996834640 is an abundant number, since it is smaller than the sum of its proper divisors (69336658936560).

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

28364996834640 is a wasteful number, since it uses less digits than its factorization.

28364996834640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13131943001 (or 13131942989 counting only the distinct ones).

The product of its (nonzero) digits is 1289945088, while the sum is 72.

The spelling of 28364996834640 in words is "twenty-eight trillion, three hundred sixty-four billion, nine hundred ninety-six million, eight hundred thirty-four thousand, six hundred forty".