123938406 has 24 divisors (see below), whose sum is σ = 282667320. Its totient is φ = 39138336.

The previous prime is 123938393. The next prime is 123938407. The reversal of 123938406 is 604839321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123938407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180855 + ... + 181538.

It is an arithmetic number, because the mean of its divisors is an integer number (11777805).

Almost surely, 2^123938406 is an apocalyptic number.

123938406 is an abundant number, since it is smaller than the sum of its proper divisors (158728914).

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

123938406 is a wasteful number, since it uses less digits than its factorization.

123938406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362420 (or 362417 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 123938406 is about 11132.7627298887. The cubic root of 123938406 is about 498.5805152731.

The spelling of 123938406 in words is "one hundred twenty-three million, nine hundred thirty-eight thousand, four hundred six".