23271138 has 56 divisors (see below), whose sum is σ = 57133296. Its totient is φ = 7047000.

The previous prime is 23271133. The next prime is 23271139. The reversal of 23271138 is 83117232.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (23271133) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 15313 + ... + 16763.

Almost surely, 2^23271138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23271138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28566648).

23271138 is an abundant number, since it is smaller than the sum of its proper divisors (33862158).

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

23271138 is a wasteful number, since it uses less digits than its factorization.

23271138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482 (or 1467 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 23271138 is about 4824.0167910156. The cubic root of 23271138 is about 285.4998430667.

It can be divided in two parts, 23271 and 138, that added together give a square (23409 = 153²).

The spelling of 23271138 in words is "twenty-three million, two hundred seventy-one thousand, one hundred thirty-eight".