123392872 has 8 divisors (see below), whose sum is σ = 231361650. Its totient is φ = 61696432.

The previous prime is 123392837. The next prime is 123392873. The reversal of 123392872 is 278293321.

It can be written as a sum of positive squares in only one way, i.e., 68128516 + 55264356 = 8254^2 + 7434^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (123392873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7712047 + ... + 7712062.

Almost surely, 2^123392872 is an apocalyptic number.

It is an amenable number.

123392872 is a deficient number, since it is larger than the sum of its proper divisors (107968778).

123392872 is a wasteful number, since it uses less digits than its factorization.

123392872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15424115 (or 15424111 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 123392872 is about 11108.2344231655. The cubic root of 123392872 is about 497.8479129995.

The spelling of 123392872 in words is "one hundred twenty-three million, three hundred ninety-two thousand, eight hundred seventy-two".