138397146 has 8 divisors (see below), whose sum is σ = 276794304. Its totient is φ = 46132380.

The previous prime is 138397139. The next prime is 138397163. The reversal of 138397146 is 641793831.

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

138397146 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 138397098 and 138397107.

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, 11533090 + ... + 11533101.

It is an arithmetic number, because the mean of its divisors is an integer number (34599288).

Almost surely, 2^138397146 is an apocalyptic number.

138397146 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.

138397146 is a wasteful number, since it uses less digits than its factorization.

138397146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23066196.

The product of its digits is 108864, while the sum is 42.

The square root of 138397146 is about 11764.2316366178. The cubic root of 138397146 is about 517.2601777992.

The spelling of 138397146 in words is "one hundred thirty-eight million, three hundred ninety-seven thousand, one hundred forty-six".