123540432 has 40 divisors (see below), whose sum is σ = 335945760. Its totient is φ = 39012480.

The previous prime is 123540409. The next prime is 123540449. The reversal of 123540432 is 234045321.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 66819 + ... + 68642.

It is an arithmetic number, because the mean of its divisors is an integer number (8398644).

Almost surely, 2^123540432 is an apocalyptic number.

123540432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123540432 is an abundant number, since it is smaller than the sum of its proper divisors (212405328).

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

123540432 is a wasteful number, since it uses less digits than its factorization.

123540432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135491 (or 135485 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 123540432 is about 11114.8743582642. The cubic root of 123540432 is about 498.0462852740.

Adding to 123540432 its reverse (234045321), we get a palindrome (357585753).

The spelling of 123540432 in words is "one hundred twenty-three million, five hundred forty thousand, four hundred thirty-two".