28213249023 has 64 divisors (see below), whose sum is σ = 44678937600. Its totient is φ = 17557119360.

The previous prime is 28213248997. The next prime is 28213249033. The reversal of 28213249023 is 32094231282.

It is a Cunningham number, because it is equal to 167968²-1.

It is not a de Polignac number, because 28213249023 - 2²⁰ = 28212200447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28213249033) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4532053 + ... + 4538273.

It is an arithmetic number, because the mean of its divisors is an integer number (698108400).

Almost surely, 2^28213249023 is an apocalyptic number.

28213249023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28213249023 is a deficient number, since it is larger than the sum of its proper divisors (16465688577).

28213249023 is a wasteful number, since it uses less digits than its factorization.

28213249023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6429 (or 6423 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 28213249023 in words is "twenty-eight billion, two hundred thirteen million, two hundred forty-nine thousand, twenty-three".