28536355920 has 80 divisors (see below), whose sum is σ = 89783092800. Its totient is φ = 7496113152.

The previous prime is 28536355909. The next prime is 28536355937. The reversal of 28536355920 is 2955363582.

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 (48).

It is a self number, because there is not a number n which added to its sum of digits gives 28536355920.

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, 871245 + ... + 903404.

It is an arithmetic number, because the mean of its divisors is an integer number (1122288660).

Almost surely, 2^28536355920 is an apocalyptic number.

28536355920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28536355920 is an abundant number, since it is smaller than the sum of its proper divisors (61246736880).

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

28536355920 is a wasteful number, since it uses less digits than its factorization.

28536355920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774732 (or 1774726 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 28536355920 in words is "twenty-eight billion, five hundred thirty-six million, three hundred fifty-five thousand, nine hundred twenty".