138470986 has 8 divisors (see below), whose sum is σ = 214406784. Its totient is φ = 67002060.

The previous prime is 138470929. The next prime is 138470987. The reversal of 138470986 is 689074831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (138470987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116640 + ... + 1116763.

It is an arithmetic number, because the mean of its divisors is an integer number (26800848).

Almost surely, 2^138470986 is an apocalyptic number.

138470986 is a deficient number, since it is larger than the sum of its proper divisors (75935798).

138470986 is a wasteful number, since it uses less digits than its factorization.

138470986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233436.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 138470986 is about 11767.3695446349. The cubic root of 138470986 is about 517.3521539272.

The spelling of 138470986 in words is "one hundred thirty-eight million, four hundred seventy thousand, nine hundred eighty-six".