28440107923 has 8 divisors (see below), whose sum is σ = 28793207088. Its totient is φ = 28088788224.

The previous prime is 28440107921. The next prime is 28440107957. The reversal of 28440107923 is 32970104482.

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 28440107923 - 2¹ = 28440107921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28440107921) 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, 412690 + ... + 476647.

It is an arithmetic number, because the mean of its divisors is an integer number (3599150886).

Almost surely, 2^28440107923 is an apocalyptic number.

28440107923 is a deficient number, since it is larger than the sum of its proper divisors (353099165).

28440107923 is a wasteful number, since it uses less digits than its factorization.

28440107923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889733.

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 28440107923 in words is "twenty-eight billion, four hundred forty million, one hundred seven thousand, nine hundred twenty-three".