123839664 has 40 divisors (see below), whose sum is σ = 344530032. Its totient is φ = 38104320.

The previous prime is 123839633. The next prime is 123839669. The reversal of 123839664 is 466938321.

It is not an unprimeable number, because it can be changed into a prime (123839669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98607 + ... + 99854.

Almost surely, 2^123839664 is an apocalyptic number.

It is an amenable number.

123839664 is an abundant number, since it is smaller than the sum of its proper divisors (220690368).

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

123839664 is a wasteful number, since it uses less digits than its factorization.

123839664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198485 (or 198479 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 123839664 is about 11128.3270979964. The cubic root of 123839664 is about 498.4480733645.

The spelling of 123839664 in words is "one hundred twenty-three million, eight hundred thirty-nine thousand, six hundred sixty-four".