138470646 has 8 divisors (see below), whose sum is σ = 276941304. Its totient is φ = 46156880.

The previous prime is 138470639. The next prime is 138470659. The reversal of 138470646 is 646074831.

It is a sphenic number, since it is the product of 3 distinct primes.

138470646 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11539215 + ... + 11539226.

It is an arithmetic number, because the mean of its divisors is an integer number (34617663).

Almost surely, 2^138470646 is an apocalyptic number.

138470646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138470646 is a wasteful number, since it uses less digits than its factorization.

138470646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23078446.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 138470646 is about 11767.3550978969. The cubic root of 138470646 is about 517.3517304934.

The spelling of 138470646 in words is "one hundred thirty-eight million, four hundred seventy thousand, six hundred forty-six".