138179646 has 24 divisors (see below), whose sum is σ = 326606904. Its totient is φ = 41872560.

The previous prime is 138179623. The next prime is 138179659. The reversal of 138179646 is 646971831.

It is a happy number.

138179646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138179646² = 38187229137370632, which contains 22 as substring.

It is a congruent number.

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, 348741 + ... + 349136.

It is an arithmetic number, because the mean of its divisors is an integer number (13608621).

Almost surely, 2^138179646 is an apocalyptic number.

138179646 is an abundant number, since it is smaller than the sum of its proper divisors (188427258).

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

138179646 is a wasteful number, since it uses less digits than its factorization.

138179646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697896 (or 697893 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 138179646 is about 11754.9838791893. The cubic root of 138179646 is about 516.9890665342.

The spelling of 138179646 in words is "one hundred thirty-eight million, one hundred seventy-nine thousand, six hundred forty-six".