28866363876720 has 120 divisors (see below), whose sum is σ = 96948001924800. Its totient is φ = 7697289696768.

The previous prime is 28866363876703. The next prime is 28866363876761. The reversal of 28866363876720 is 2767836366882.

28866363876720 is a `hidden beast` number, since 2 + 88 + 66 + 36 + 387 + 67 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

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 23 ways as a sum of consecutive naturals, for example, 12678441 + ... + 14780919.

It is an arithmetic number, because the mean of its divisors is an integer number (807900016040).

Almost surely, 2^{28866363876720} is an apocalyptic number.

28866363876720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28866363876720 is an abundant number, since it is smaller than the sum of its proper divisors (68081638048080).

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

28866363876720 is a wasteful number, since it uses less digits than its factorization.

28866363876720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121567 (or 2121558 counting only the distinct ones).

The product of its (nonzero) digits is 1170505728, while the sum is 72.

The spelling of 28866363876720 in words is "twenty-eight trillion, eight hundred sixty-six billion, three hundred sixty-three million, eight hundred seventy-six thousand, seven hundred twenty".