138291070 has 16 divisors (see below), whose sum is σ = 250178400. Its totient is φ = 55037664.

The previous prime is 138291047. The next prime is 138291071. The reversal of 138291070 is 70192831.

138291070 is digitally balanced in base 3, 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 (138291071) 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, 32757 + ... + 36736.

It is an arithmetic number, because the mean of its divisors is an integer number (15636150).

Almost surely, 2^138291070 is an apocalyptic number.

138291070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138291070 is a deficient number, since it is larger than the sum of its proper divisors (111887330).

138291070 is a wasteful number, since it uses less digits than its factorization.

138291070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69699.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 138291070 is about 11759.7223606682. The cubic root of 138291070 is about 517.1279907890.

The spelling of 138291070 in words is "one hundred thirty-eight million, two hundred ninety-one thousand, seventy".