138097386 has 84 divisors (see below), whose sum is σ = 361470402. Its totient is φ = 39435984.

The previous prime is 138097369. The next prime is 138097411. The reversal of 138097386 is 683790831.

It is a happy number.

138097386 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 108056025 + 30041361 = 10395^2 + 5481^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 70476 + ... + 72408.

Almost surely, 2^138097386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138097386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180735201).

138097386 is an abundant number, since it is smaller than the sum of its proper divisors (223373016).

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

138097386 is an equidigital number, since it uses as much as digits as its factorization.

138097386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967 (or 1945 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 138097386 is about 11751.4844168726. The cubic root of 138097386 is about 516.8864562399.

The spelling of 138097386 in words is "one hundred thirty-eight million, ninety-seven thousand, three hundred eighty-six".