23278026239 has 4 divisors (see below), whose sum is σ = 25068643656. Its totient is φ = 21487408824.

The previous prime is 23278026227. The next prime is 23278026257. The reversal of 23278026239 is 93262087232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23278026239 - 2¹² = 23278022143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23278026239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23278026259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 895308689 + ... + 895308714.

It is an arithmetic number, because the mean of its divisors is an integer number (6267160914).

Almost surely, 2^23278026239 is an apocalyptic number.

23278026239 is a deficient number, since it is larger than the sum of its proper divisors (1790617417).

23278026239 is a wasteful number, since it uses less digits than its factorization.

23278026239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790617416.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 23278026239 in words is "twenty-three billion, two hundred seventy-eight million, twenty-six thousand, two hundred thirty-nine".