138828342 has 8 divisors (see below), whose sum is σ = 277656696. Its totient is φ = 46276112.

The previous prime is 138828301. The next prime is 138828353. The reversal of 138828342 is 243828831.

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

138828342 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 138828342.

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, 11569023 + ... + 11569034.

It is an arithmetic number, because the mean of its divisors is an integer number (34707087).

Almost surely, 2^138828342 is an apocalyptic number.

138828342 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.

138828342 is a wasteful number, since it uses less digits than its factorization.

138828342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23138062.

The product of its digits is 73728, while the sum is 39.

The square root of 138828342 is about 11782.5439528143. The cubic root of 138828342 is about 517.7968200832.

The spelling of 138828342 in words is "one hundred thirty-eight million, eight hundred twenty-eight thousand, three hundred forty-two".