23831388 has 96 divisors (see below), whose sum is σ = 73113600. Its totient is φ = 6568128.

The previous prime is 23831371. The next prime is 23831393. The reversal of 23831388 is 88313832.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21381 + ... + 22467.

It is an arithmetic number, because the mean of its divisors is an integer number (761600).

Almost surely, 2^23831388 is an apocalyptic number.

23831388 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23831388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36556800).

23831388 is an abundant number, since it is smaller than the sum of its proper divisors (49282212).

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

23831388 is a wasteful number, since it uses less digits than its factorization.

23831388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 1128 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 23831388 is about 4881.7402634716. The cubic root of 23831388 is about 287.7728243222.

It can be divided in two parts, 238 and 31388, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 23831388 in words is "twenty-three million, eight hundred thirty-one thousand, three hundred eighty-eight".