139638260 has 24 divisors (see below), whose sum is σ = 302701056. Its totient is φ = 54053280.

The previous prime is 139638217. The next prime is 139638263. The reversal of 139638260 is 62836931.

139638260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139638263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111992 + ... + 113231.

It is an arithmetic number, because the mean of its divisors is an integer number (12612544).

Almost surely, 2^139638260 is an apocalyptic number.

139638260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139638260 is an abundant number, since it is smaller than the sum of its proper divisors (163062796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139638260 is a wasteful number, since it uses less digits than its factorization.

139638260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225263 (or 225261 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 139638260 is about 11816.8633740092. The cubic root of 139638260 is about 518.8018023461.

The spelling of 139638260 in words is "one hundred thirty-nine million, six hundred thirty-eight thousand, two hundred sixty".