28454237881 has 8 divisors (see below), whose sum is σ = 28535986080. Its totient is φ = 28372601472.

The previous prime is 28454237863. The next prime is 28454237953. The reversal of 28454237881 is 18873245482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28454237881 - 2¹¹ = 28454235833 is a prime.

It is a super-2 number, since 2×28454237881² (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 (28454217881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495826 + ... + 550228.

It is an arithmetic number, because the mean of its divisors is an integer number (3566998260).

Almost surely, 2^28454237881 is an apocalyptic number.

It is an amenable number.

28454237881 is a deficient number, since it is larger than the sum of its proper divisors (81748199).

28454237881 is an equidigital number, since it uses as much as digits as its factorization.

28454237881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55895.

The product of its digits is 3440640, while the sum is 52.

The spelling of 28454237881 in words is "twenty-eight billion, four hundred fifty-four million, two hundred thirty-seven thousand, eight hundred eighty-one".