123307638 has 16 divisors (see below), whose sum is σ = 246769200. Its totient is φ = 41076896.

The previous prime is 123307609. The next prime is 123307651. The reversal of 123307638 is 836703321.

It is a junction number, because it is equal to n+sod(n) for n = 123307599 and 123307608.

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, 5788 + ... + 16736.

It is an arithmetic number, because the mean of its divisors is an integer number (15423075).

Almost surely, 2^123307638 is an apocalyptic number.

123307638 is an abundant number, since it is smaller than the sum of its proper divisors (123461562).

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

123307638 is a wasteful number, since it uses less digits than its factorization.

123307638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12831.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 123307638 is about 11104.3972371309. The cubic root of 123307638 is about 497.7332566112.

The spelling of 123307638 in words is "one hundred twenty-three million, three hundred seven thousand, six hundred thirty-eight".