23261766 has 36 divisors (see below), whose sum is σ = 51424716. Its totient is φ = 7009640.

The previous prime is 23261761. The next prime is 23261779. The reversal of 23261766 is 66716232.

It is a super-2 number, since 2×23261766² = 1082219514877512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23261761) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 129865 + ... + 130043.

Almost surely, 2^23261766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23261766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25712358).

23261766 is an abundant number, since it is smaller than the sum of its proper divisors (28162950).

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

23261766 is a wasteful number, since it uses less digits than its factorization.

23261766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 195 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 23261766 is about 4823.0453035401. The cubic root of 23261766 is about 285.4615114102.

Adding to 23261766 its reverse (66716232), we get a palindrome (89977998).

The spelling of 23261766 in words is "twenty-three million, two hundred sixty-one thousand, seven hundred sixty-six".