138989310 has 32 divisors (see below), whose sum is σ = 337599360. Its totient is φ = 36616608.

The previous prime is 138989281. The next prime is 138989317. The reversal of 138989310 is 13989831.

It is a happy number.

It is a super-2 number, since 2×138989310² = 38636056588552200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138989317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25420 + ... + 30399.

It is an arithmetic number, because the mean of its divisors is an integer number (10549980).

Almost surely, 2^138989310 is an apocalyptic number.

138989310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138989310 is an abundant number, since it is smaller than the sum of its proper divisors (198610050).

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

138989310 is a wasteful number, since it uses less digits than its factorization.

138989310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55912.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 138989310 is about 11789.3727568518. The cubic root of 138989310 is about 517.9968669528.

The spelling of 138989310 in words is "one hundred thirty-eight million, nine hundred eighty-nine thousand, three hundred ten".