28923311393 has 16 divisors (see below), whose sum is σ = 30960921600. Its totient is φ = 26939399760.

The previous prime is 28923311387. The next prime is 28923311423. The reversal of 28923311393 is 39311332982.

It is a cyclic number.

It is not a de Polignac number, because 28923311393 - 2⁴ = 28923311377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28923311303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454430 + ... + 514152.

It is an arithmetic number, because the mean of its divisors is an integer number (1935057600).

Almost surely, 2^28923311393 is an apocalyptic number.

It is an amenable number.

28923311393 is a deficient number, since it is larger than the sum of its proper divisors (2037610207).

28923311393 is a wasteful number, since it uses less digits than its factorization.

28923311393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60172.

The product of its digits is 209952, while the sum is 44.

The spelling of 28923311393 in words is "twenty-eight billion, nine hundred twenty-three million, three hundred eleven thousand, three hundred ninety-three".