28653856920 has 160 divisors (see below), whose sum is σ = 103717318320. Its totient is φ = 7053246720.

The previous prime is 28653856909. The next prime is 28653856937. The reversal of 28653856920 is 2965835682.

28653856920 is a `hidden beast` number, since 2 + 8 + 6 + 53 + 8 + 569 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 298026 + ... + 382265.

Almost surely, 2^28653856920 is an apocalyptic number.

28653856920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28653856920 is an abundant number, since it is smaller than the sum of its proper divisors (75063461400).

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

28653856920 is a wasteful number, since it uses less digits than its factorization.

28653856920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680327 (or 680314 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 28653856920 in words is "twenty-eight billion, six hundred fifty-three million, eight hundred fifty-six thousand, nine hundred twenty".