123401992 has 48 divisors (see below), whose sum is σ = 280877760. Its totient is φ = 50583456.

The previous prime is 123401977. The next prime is 123402011. The reversal of 123401992 is 299104321.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2173 + ... + 15859.

It is an arithmetic number, because the mean of its divisors is an integer number (5851620).

Almost surely, 2^123401992 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 123401992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140438880).

123401992 is an abundant number, since it is smaller than the sum of its proper divisors (157475768).

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

123401992 is a wasteful number, since it uses less digits than its factorization.

123401992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13730 (or 13719 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 123401992 is about 11108.6449218615. The cubic root of 123401992 is about 497.8601780546.

The spelling of 123401992 in words is "one hundred twenty-three million, four hundred one thousand, nine hundred ninety-two".