123138092 has 48 divisors (see below), whose sum is σ = 269525760. Its totient is φ = 47822400.

The previous prime is 123138017. The next prime is 123138121. The reversal of 123138092 is 290831321.

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, 166259 + ... + 166997.

It is an arithmetic number, because the mean of its divisors is an integer number (5615120).

Almost surely, 2^123138092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123138092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134762880).

123138092 is an abundant number, since it is smaller than the sum of its proper divisors (146387668).

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

123138092 is a wasteful number, since it uses less digits than its factorization.

123138092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 123138092 is about 11096.7604281610. The cubic root of 123138092 is about 497.5050269266.

The spelling of 123138092 in words is "one hundred twenty-three million, one hundred thirty-eight thousand, ninety-two".