28255507805502 has 24 divisors (see below), whose sum is σ = 61267687773240. Its totient is φ = 9411207084720.

The previous prime is 28255507805491. The next prime is 28255507805521. The reversal of 28255507805502 is 20550870555282.

28255507805502 is a `hidden beast` number, since 2 + 8 + 2 + 5 + 5 + 5 + 0 + 7 + 80 + 550 + 2 = 666.

It is a super-2 number, since 2×28255507805502² (a number of 28 digits) contains 22 as substring.

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, 607935877 + ... + 607982352.

It is an arithmetic number, because the mean of its divisors is an integer number (2552820323885).

Almost surely, 2^{28255507805502} is an apocalyptic number.

28255507805502 is an abundant number, since it is smaller than the sum of its proper divisors (33012179967738).

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

28255507805502 is a wasteful number, since it uses less digits than its factorization.

28255507805502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215919528 (or 1215919525 counting only the distinct ones).

The product of its (nonzero) digits is 11200000, while the sum is 54.

The spelling of 28255507805502 in words is "twenty-eight trillion, two hundred fifty-five billion, five hundred seven million, eight hundred five thousand, five hundred two".