28455133320 has 48 divisors (see below), whose sum is σ = 92479184460. Its totient is φ = 7588035456.

The previous prime is 28455133303. The next prime is 28455133373. The reversal of 28455133320 is 2333155482.

28455133320 is a `hidden beast` number, since 2 + 84 + 551 + 3 + 3 + 3 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27080651844 + 1374481476 = 164562^2 + 37074^2 .

It is a super-2 number, since 2×28455133320² (a number of 22 digits) contains 22 as substring.

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

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, 39520659 + ... + 39521378.

Almost surely, 2^28455133320 is an apocalyptic number.

28455133320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28455133320 is an abundant number, since it is smaller than the sum of its proper divisors (64024051140).

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

28455133320 is a wasteful number, since it uses less digits than its factorization.

28455133320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79042054 (or 79042047 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 28455133320 in words is "twenty-eight billion, four hundred fifty-five million, one hundred thirty-three thousand, three hundred twenty".