28553034240 has 120 divisors (see below), whose sum is σ = 98887267908. Its totient is φ = 7614136320.

The previous prime is 28553034217. The next prime is 28553034259. The reversal of 28553034240 is 4243035582.

28553034240 is a `hidden beast` number, since 2 + 85 + 530 + 3 + 4 + 2 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28272404736 + 280629504 = 168144^2 + 16752^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×28553034240² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28553034195 and 28553034204.

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, 596601 + ... + 642680.

Almost surely, 2^28553034240 is an apocalyptic number.

28553034240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28553034240 is an abundant number, since it is smaller than the sum of its proper divisors (70334233668).

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

28553034240 is a wasteful number, since it uses less digits than its factorization.

28553034240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239310 (or 1239291 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 28553034240 in words is "twenty-eight billion, five hundred fifty-three million, thirty-four thousand, two hundred forty".