123440032 has 24 divisors (see below), whose sum is σ = 246449952. Its totient is φ = 60849600.

The previous prime is 123439999. The next prime is 123440033. The reversal of 123440032 is 230044321.

It is a super-2 number, since 2×123440032² = 30474883000322048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123439991 and 123440009.

It is not an unprimeable number, because it can be changed into a prime (123440033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24894 + ... + 29437.

It is an arithmetic number, because the mean of its divisors is an integer number (10268748).

Almost surely, 2^123440032 is an apocalyptic number.

It is an amenable number.

123440032 is a deficient number, since it is larger than the sum of its proper divisors (123009920).

123440032 is an equidigital number, since it uses as much as digits as its factorization.

123440032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54412 (or 54404 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 123440032 is about 11110.3569699628. The cubic root of 123440032 is about 497.9113297289.

Adding to 123440032 its reverse (230044321), we get a palindrome (353484353).

The spelling of 123440032 in words is "one hundred twenty-three million, four hundred forty thousand, thirty-two".