28512689884926 has 32 divisors (see below), whose sum is σ = 61524218007168. Its totient is φ = 8757096697440.

The previous prime is 28512689884897. The next prime is 28512689884933. The reversal of 28512689884926 is 62948898621582.

It is a super-2 number, since 2×28512689884926² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (78).

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, 334095640 + ... + 334180971.

It is an arithmetic number, because the mean of its divisors is an integer number (1922631812724).

Almost surely, 2^{28512689884926} is an apocalyptic number.

28512689884926 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28512689884926 is an abundant number, since it is smaller than the sum of its proper divisors (33011528122242).

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

28512689884926 is a wasteful number, since it uses less digits than its factorization.

28512689884926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668277176.

The product of its digits is 1911029760, while the sum is 78.

The spelling of 28512689884926 in words is "twenty-eight trillion, five hundred twelve billion, six hundred eighty-nine million, eight hundred eighty-four thousand, nine hundred twenty-six".