23011988 has 12 divisors (see below), whose sum is σ = 41253492. Its totient is φ = 11225280.

The previous prime is 23011987. The next prime is 23011991. The reversal of 23011988 is 88911032.

It can be written as a sum of positive squares in 2 ways, for example, as 12759184 + 10252804 = 3572^2 + 3202^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23011987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69995 + ... + 70322.

It is an arithmetic number, because the mean of its divisors is an integer number (3437791).

Almost surely, 2^23011988 is an apocalyptic number.

It is an amenable number.

23011988 is a deficient number, since it is larger than the sum of its proper divisors (18241504).

23011988 is a wasteful number, since it uses less digits than its factorization.

23011988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140362 (or 140360 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 23011988 is about 4797.0811958940. The cubic root of 23011988 is about 284.4360985010.

The spelling of 23011988 in words is "twenty-three million, eleven thousand, nine hundred eighty-eight".