138847378 has 16 divisors (see below), whose sum is σ = 211055040. Its totient is φ = 68502096.

The previous prime is 138847367. The next prime is 138847391. The reversal of 138847378 is 873748831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46651 + ... + 49537.

It is an arithmetic number, because the mean of its divisors is an integer number (13190940).

Almost surely, 2^138847378 is an apocalyptic number.

138847378 is a deficient number, since it is larger than the sum of its proper divisors (72207662).

138847378 is a wasteful number, since it uses less digits than its factorization.

138847378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201.

The product of its digits is 903168, while the sum is 49.

The square root of 138847378 is about 11783.3517303015. The cubic root of 138847378 is about 517.8204855914.

The spelling of 138847378 in words is "one hundred thirty-eight million, eight hundred forty-seven thousand, three hundred seventy-eight".