138944794 has 8 divisors (see below), whose sum is σ = 217478880. Its totient is φ = 66451836.

The previous prime is 138944789. The next prime is 138944797. The reversal of 138944794 is 497449831.

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

It is not an unprimeable number, because it can be changed into a prime (138944797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1510224 + ... + 1510315.

It is an arithmetic number, because the mean of its divisors is an integer number (27184860).

Almost surely, 2^138944794 is an apocalyptic number.

138944794 is a deficient number, since it is larger than the sum of its proper divisors (78534086).

138944794 is a wasteful number, since it uses less digits than its factorization.

138944794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020564.

The product of its digits is 870912, while the sum is 49.

The square root of 138944794 is about 11787.4846341363. The cubic root of 138944794 is about 517.9415590763.

The spelling of 138944794 in words is "one hundred thirty-eight million, nine hundred forty-four thousand, seven hundred ninety-four".