115139380 has 48 divisors (see below), whose sum is σ = 258217344. Its totient is φ = 43021440.

The previous prime is 115139377. The next prime is 115139441. The reversal of 115139380 is 83931511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16870 + ... + 22690.

It is an arithmetic number, because the mean of its divisors is an integer number (5379528).

Almost surely, 2^115139380 is an apocalyptic number.

115139380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115139380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129108672).

115139380 is an abundant number, since it is smaller than the sum of its proper divisors (143077964).

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

115139380 is a wasteful number, since it uses less digits than its factorization.

115139380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5896 (or 5894 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 115139380 is about 10730.3019528809. The cubic root of 115139380 is about 486.4907967347.

The spelling of 115139380 in words is "one hundred fifteen million, one hundred thirty-nine thousand, three hundred eighty".