139840670 has 16 divisors (see below), whose sum is σ = 255840768. Its totient is φ = 55019040.

The previous prime is 139840669. The next prime is 139840681. The reversal of 139840670 is 76048931.

139840670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 114014 + ... + 115233.

It is an arithmetic number, because the mean of its divisors is an integer number (15990048).

Almost surely, 2^139840670 is an apocalyptic number.

139840670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139840670 is a deficient number, since it is larger than the sum of its proper divisors (116000098).

139840670 is a wasteful number, since it uses less digits than its factorization.

139840670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229315.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 139840670 is about 11825.4247281017. The cubic root of 139840670 is about 519.0523544390.

The spelling of 139840670 in words is "one hundred thirty-nine million, eight hundred forty thousand, six hundred seventy".