139433638 has 16 divisors (see below), whose sum is σ = 214598160. Its totient is φ = 67922176.

The previous prime is 139433611. The next prime is 139433641. The reversal of 139433638 is 836334931.

139433638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 139433638.

It is a congruent number.

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, 8106 + ... + 18562.

It is an arithmetic number, because the mean of its divisors is an integer number (13412385).

Almost surely, 2^139433638 is an apocalyptic number.

139433638 is a deficient number, since it is larger than the sum of its proper divisors (75164522).

139433638 is a wasteful number, since it uses less digits than its factorization.

139433638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10631.

The product of its digits is 139968, while the sum is 40.

The square root of 139433638 is about 11808.2021493536. The cubic root of 139433638 is about 518.5482659145.

The spelling of 139433638 in words is "one hundred thirty-nine million, four hundred thirty-three thousand, six hundred thirty-eight".