23111478 has 48 divisors (see below), whose sum is σ = 54272400. Its totient is φ = 7065792.

The previous prime is 23111477. The next prime is 23111479. The reversal of 23111478 is 87411132.

It is an interprime number because it is at equal distance from previous prime (23111477) and next prime (23111479).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23111471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66048 + ... + 66396.

It is an arithmetic number, because the mean of its divisors is an integer number (1130675).

Almost surely, 2^23111478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23111478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27136200).

23111478 is an abundant number, since it is smaller than the sum of its proper divisors (31160922).

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

23111478 is a wasteful number, since it uses less digits than its factorization.

23111478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 650 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 23111478 is about 4807.4398592182. The cubic root of 23111478 is about 284.8454194043.

The spelling of 23111478 in words is "twenty-three million, one hundred eleven thousand, four hundred seventy-eight".