123442636 has 12 divisors (see below), whose sum is σ = 221293800. Its totient is φ = 60215840.

The previous prime is 123442597. The next prime is 123442667. The reversal of 123442636 is 636244321.

It is a junction number, because it is equal to n+sod(n) for n = 123442598 and 123442607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376186 + ... + 376513.

It is an arithmetic number, because the mean of its divisors is an integer number (18441150).

Almost surely, 2^123442636 is an apocalyptic number.

It is an amenable number.

123442636 is a deficient number, since it is larger than the sum of its proper divisors (97851164).

123442636 is a wasteful number, since it uses less digits than its factorization.

123442636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752744 (or 752742 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The square root of 123442636 is about 11110.4741572986. The cubic root of 123442636 is about 497.9148308945.

Adding to 123442636 its reverse (636244321), we get a palindrome (759686957).

The spelling of 123442636 in words is "one hundred twenty-three million, four hundred forty-two thousand, six hundred thirty-six".