23128777 has 16 divisors (see below), whose sum is σ = 27885312. Its totient is φ = 18754560.

The previous prime is 23128733. The next prime is 23128793. The reversal of 23128777 is 77782132.

It is a cyclic number.

It is not a de Polignac number, because 23128777 - 2¹¹ = 23126729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23128717) 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, 14877 + ... + 16357.

It is an arithmetic number, because the mean of its divisors is an integer number (1742832).

Almost surely, 2^23128777 is an apocalyptic number.

It is an amenable number.

23128777 is a deficient number, since it is larger than the sum of its proper divisors (4756535).

23128777 is a wasteful number, since it uses less digits than its factorization.

23128777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608.

The product of its digits is 32928, while the sum is 37.

The square root of 23128777 is about 4809.2387131437. The cubic root of 23128777 is about 284.9164708532.

The spelling of 23128777 in words is "twenty-three million, one hundred twenty-eight thousand, seven hundred seventy-seven".