28454226621 has 16 divisors (see below), whose sum is σ = 38024925120. Its totient is φ = 18926541440.

The previous prime is 28454226589. The next prime is 28454226623. The reversal of 28454226621 is 12662245482.

It is a cyclic number.

It is not a de Polignac number, because 28454226621 - 2⁵ = 28454226589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28454226623) 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, 6451465 + ... + 6455873.

It is an arithmetic number, because the mean of its divisors is an integer number (2376557820).

Almost surely, 2^28454226621 is an apocalyptic number.

It is an amenable number.

28454226621 is a deficient number, since it is larger than the sum of its proper divisors (9570698499).

28454226621 is a wasteful number, since it uses less digits than its factorization.

28454226621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8796.

The product of its digits is 368640, while the sum is 42.

The spelling of 28454226621 in words is "twenty-eight billion, four hundred fifty-four million, two hundred twenty-six thousand, six hundred twenty-one".