139293838 has 8 divisors (see below), whose sum is σ = 209046600. Its totient is φ = 69611640.

The previous prime is 139293823. The next prime is 139293839. The reversal of 139293838 is 838392931.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139293839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12393 + ... + 20788.

It is an arithmetic number, because the mean of its divisors is an integer number (26130825).

Almost surely, 2^139293838 is an apocalyptic number.

139293838 is a deficient number, since it is larger than the sum of its proper divisors (69752762).

139293838 is a wasteful number, since it uses less digits than its factorization.

139293838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35282.

The product of its digits is 279936, while the sum is 46.

The square root of 139293838 is about 11802.2810507122. The cubic root of 139293838 is about 518.3749043786.

The spelling of 139293838 in words is "one hundred thirty-nine million, two hundred ninety-three thousand, eight hundred thirty-eight".