23655690 has 48 divisors (see below), whose sum is σ = 62438688. Its totient is φ = 6212448.

The previous prime is 23655689. The next prime is 23655713. The reversal of 23655690 is 9655632.

It is a super-2 number, since 2×23655690² = 1119183338752200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4069 + ... + 7991.

It is an arithmetic number, because the mean of its divisors is an integer number (1300806).

Almost surely, 2^23655690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23655690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31219344).

23655690 is an abundant number, since it is smaller than the sum of its proper divisors (38782998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23655690 is a wasteful number, since it uses less digits than its factorization.

23655690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003 (or 4000 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 23655690 is about 4863.7115457231. The cubic root of 23655690 is about 287.0638730876.

The spelling of 23655690 in words is "twenty-three million, six hundred fifty-five thousand, six hundred ninety".