23826861 has 6 divisors (see below), whose sum is σ = 34416590. Its totient is φ = 15884568.

The previous prime is 23826811. The next prime is 23826883. The reversal of 23826861 is 16862832.

It can be written as a sum of positive squares in only one way, i.e., 23474025 + 352836 = 4845^2 + 594^2 .

It is not a de Polignac number, because 23826861 - 2⁶ = 23826797 is a prime.

It is a super-2 number, since 2×23826861² = 1135438610226642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23826811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1323706 + ... + 1323723.

Almost surely, 2^23826861 is an apocalyptic number.

It is an amenable number.

23826861 is a deficient number, since it is larger than the sum of its proper divisors (10589729).

23826861 is a wasteful number, since it uses less digits than its factorization.

23826861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647435 (or 2647432 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 23826861 is about 4881.2765748316. The cubic root of 23826861 is about 287.7546014351.

The spelling of 23826861 in words is "twenty-three million, eight hundred twenty-six thousand, eight hundred sixty-one".