139894838 has 8 divisors (see below), whose sum is σ = 213282480. Its totient is φ = 68800680.

The previous prime is 139894793. The next prime is 139894849. The reversal of 139894838 is 838498931.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 139894838.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573218 + ... + 573461.

It is an arithmetic number, because the mean of its divisors is an integer number (26660310).

Almost surely, 2^139894838 is an apocalyptic number.

139894838 is a deficient number, since it is larger than the sum of its proper divisors (73387642).

139894838 is a wasteful number, since it uses less digits than its factorization.

139894838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146742.

The product of its digits is 1492992, while the sum is 53.

The square root of 139894838 is about 11827.7148257810. The cubic root of 139894838 is about 519.1193649838.

The spelling of 139894838 in words is "one hundred thirty-nine million, eight hundred ninety-four thousand, eight hundred thirty-eight".