28215916459776 has 216 divisors, whose sum is σ = 87817814491680. Its totient is φ = 8686158716928.

The previous prime is 28215916459739. The next prime is 28215916459823. The reversal of 28215916459776 is 67795461951282.

28215916459776 is a `hidden beast` number, since 2 + 8 + 2 + 15 + 9 + 16 + 4 + 597 + 7 + 6 = 666.

It is a super-2 number, since 2×28215916459776² (a number of 28 digits) contains 22 as substring.

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, 7643511 + ... + 10717046.

It is an arithmetic number, because the mean of its divisors is an integer number (406563955980).

Almost surely, 2^{28215916459776} is an apocalyptic number.

It is an amenable number.

28215916459776 is an abundant number, since it is smaller than the sum of its proper divisors (59601898031904).

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

28215916459776 is a wasteful number, since it uses less digits than its factorization.

28215916459776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18360631 (or 18360614 counting only the distinct ones).

The product of its digits is 457228800, while the sum is 72.

The spelling of 28215916459776 in words is "twenty-eight trillion, two hundred fifteen billion, nine hundred sixteen million, four hundred fifty-nine thousand, seven hundred seventy-six".