123531388 has 24 divisors (see below), whose sum is σ = 228024720. Its totient is φ = 58394880.

The previous prime is 123531379. The next prime is 123531433. The reversal of 123531388 is 883135321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43698 + ... + 46438.

It is an arithmetic number, because the mean of its divisors is an integer number (9501030).

Almost surely, 2^123531388 is an apocalyptic number.

It is an amenable number.

123531388 is a deficient number, since it is larger than the sum of its proper divisors (104493332).

123531388 is a wasteful number, since it uses less digits than its factorization.

123531388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357 (or 3355 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 123531388 is about 11114.4675086124. The cubic root of 123531388 is about 498.0341315187.

It can be divided in two parts, 1235 and 31388, that added together give a palindrome (32623).

The spelling of 123531388 in words is "one hundred twenty-three million, five hundred thirty-one thousand, three hundred eighty-eight".