28456205923 has 8 divisors (see below), whose sum is σ = 29173991616. Its totient is φ = 27739550400.

The previous prime is 28456205917. The next prime is 28456205929. The reversal of 28456205923 is 32950265482.

It is an interprime number because it is at equal distance from previous prime (28456205917) and next prime (28456205929).

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

It is a de Polignac number, because none of the positive numbers 2^k-28456205923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28456205929) 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, 231436 + ... + 332377.

It is an arithmetic number, because the mean of its divisors is an integer number (3646748952).

Almost surely, 2^28456205923 is an apocalyptic number.

28456205923 is a deficient number, since it is larger than the sum of its proper divisors (717785693).

28456205923 is a wasteful number, since it uses less digits than its factorization.

28456205923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565085.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 28456205923 in words is "twenty-eight billion, four hundred fifty-six million, two hundred five thousand, nine hundred twenty-three".