123249738 has 32 divisors (see below), whose sum is σ = 261342720. Its totient is φ = 38681280.

The previous prime is 123249703. The next prime is 123249743. The reversal of 123249738 is 837942321.

It is a junction number, because it is equal to n+sod(n) for n = 123249696 and 123249705.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2073 + ... + 15836.

It is an arithmetic number, because the mean of its divisors is an integer number (8166960).

Almost surely, 2^123249738 is an apocalyptic number.

123249738 is an abundant number, since it is smaller than the sum of its proper divisors (138092982).

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

123249738 is a wasteful number, since it uses less digits than its factorization.

123249738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17982.

The product of its digits is 72576, while the sum is 39.

The square root of 123249738 is about 11101.7898556944. The cubic root of 123249738 is about 497.6553396552.

It can be divided in two parts, 1232 and 49738, that multiplied together give a palindrome (61277216).

The spelling of 123249738 in words is "one hundred twenty-three million, two hundred forty-nine thousand, seven hundred thirty-eight".