28455133321 has 16 divisors (see below), whose sum is σ = 28866689280. Its totient is φ = 28046787840.

The previous prime is 28455133303. The next prime is 28455133373. The reversal of 28455133321 is 12333155482.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28455133321 - 2⁹ = 28455132809 is a prime.

It is a super-2 number, since 2×28455133321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28455133121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21938545 + ... + 21939841.

It is an arithmetic number, because the mean of its divisors is an integer number (1804168080).

Almost surely, 2^28455133321 is an apocalyptic number.

It is an amenable number.

28455133321 is a deficient number, since it is larger than the sum of its proper divisors (411555959).

28455133321 is a wasteful number, since it uses less digits than its factorization.

28455133321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304.

The product of its digits is 86400, while the sum is 37.

The spelling of 28455133321 in words is "twenty-eight billion, four hundred fifty-five million, one hundred thirty-three thousand, three hundred twenty-one".