139229638 has 8 divisors (see below), whose sum is σ = 216046080. Its totient is φ = 67214280.

The previous prime is 139229617. The next prime is 139229639. The reversal of 139229638 is 836922931.

139229638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×139229638² = 38769784195222088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139229594 and 139229603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139229639) 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, 1200198 + ... + 1200313.

It is an arithmetic number, because the mean of its divisors is an integer number (27005760).

Almost surely, 2^139229638 is an apocalyptic number.

139229638 is a deficient number, since it is larger than the sum of its proper divisors (76816442).

139229638 is a wasteful number, since it uses less digits than its factorization.

139229638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400542.

The product of its digits is 139968, while the sum is 43.

The square root of 139229638 is about 11799.5609240344. The cubic root of 139229638 is about 518.2952531333.

The spelling of 139229638 in words is "one hundred thirty-nine million, two hundred twenty-nine thousand, six hundred thirty-eight".