138342646 has 16 divisors (see below), whose sum is σ = 230686848. Its totient is φ = 61790400.

The previous prime is 138342641. The next prime is 138342649. The reversal of 138342646 is 646243831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138342641) 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, 85015 + ... + 86626.

It is an arithmetic number, because the mean of its divisors is an integer number (14417928).

Almost surely, 2^138342646 is an apocalyptic number.

138342646 is a deficient number, since it is larger than the sum of its proper divisors (92344202).

138342646 is a wasteful number, since it uses less digits than its factorization.

138342646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171687.

The product of its digits is 82944, while the sum is 37.

The square root of 138342646 is about 11761.9150651584. The cubic root of 138342646 is about 517.1922708571.

The spelling of 138342646 in words is "one hundred thirty-eight million, three hundred forty-two thousand, six hundred forty-six".