23399855 has 16 divisors (see below), whose sum is σ = 29445120. Its totient is φ = 17817888.

The previous prime is 23399851. The next prime is 23399867. The reversal of 23399855 is 55899332.

It is a cyclic number.

It is not a de Polignac number, because 23399855 - 2² = 23399851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23399851) 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, 32186 + ... + 32904.

It is an arithmetic number, because the mean of its divisors is an integer number (1840320).

Almost surely, 2^23399855 is an apocalyptic number.

23399855 is a deficient number, since it is larger than the sum of its proper divisors (6045265).

23399855 is a wasteful number, since it uses less digits than its factorization.

23399855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030.

The product of its digits is 291600, while the sum is 44.

The square root of 23399855 is about 4837.3396614255. The cubic root of 23399855 is about 286.0252598030.

The spelling of 23399855 in words is "twenty-three million, three hundred ninety-nine thousand, eight hundred fifty-five".