138115494 has 24 divisors (see below), whose sum is σ = 326455272.
Its totient is φ = 41853120.
The previous prime is 138115477. The next prime is 138115499. The reversal of 138115494 is 494511831.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (138115499) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348579 + ... + 348974.
It is an arithmetic number, because the mean of its divisors is an integer number (13602303).
Almost surely, 2138115494 is an apocalyptic number.
138115494 is an abundant number, since it is smaller than the sum of its proper divisors (188339778).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
138115494 is a wasteful number, since it uses less digits than its factorization.
138115494 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 697572 (or 697569 counting only the distinct ones).
The product of its digits is 17280, while the sum is 36.
The square root of 138115494 is about 11752.2548474750.
The cubic root of 138115494 is about 516.9090474734.
The spelling of 138115494 in words is "one hundred thirty-eight million, one hundred fifteen thousand, four hundred ninety-four".