138809034 has 96 divisors (see below), whose sum is σ = 374984064. Its totient is φ = 36132480.

The previous prime is 138809023. The next prime is 138809057. The reversal of 138809034 is 430908831.

It is a self number, because there is not a number n which added to its sum of digits gives 138809034.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135444 + ... + 136464.

It is an arithmetic number, because the mean of its divisors is an integer number (3906084).

Almost surely, 2^138809034 is an apocalyptic number.

138809034 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138809034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187492032).

138809034 is an abundant number, since it is smaller than the sum of its proper divisors (236175030).

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

138809034 is a wasteful number, since it uses less digits than its factorization.

138809034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132 (or 1129 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 138809034 is about 11781.7245766484. The cubic root of 138809034 is about 517.7728142153.

The spelling of 138809034 in words is "one hundred thirty-eight million, eight hundred nine thousand, thirty-four".