138398070 has 32 divisors (see below), whose sum is σ = 337789440. Its totient is φ = 36280160.

The previous prime is 138398059. The next prime is 138398089. The reversal of 138398070 is 70893831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37326 + ... + 40865.

It is an arithmetic number, because the mean of its divisors is an integer number (10555920).

Almost surely, 2^138398070 is an apocalyptic number.

138398070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138398070 is an abundant number, since it is smaller than the sum of its proper divisors (199391370).

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

138398070 is a wasteful number, since it uses less digits than its factorization.

138398070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78260.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 138398070 is about 11764.2709081354. The cubic root of 138398070 is about 517.2613289486.

The spelling of 138398070 in words is "one hundred thirty-eight million, three hundred ninety-eight thousand, seventy".