115639040 has 144 divisors (see below), whose sum is σ = 310818816. Its totient is φ = 40857600.

The previous prime is 115639033. The next prime is 115639061. The reversal of 115639040 is 40936511.

It is a junction number, because it is equal to n+sod(n) for n = 115638994 and 115639012.

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, 605345 + ... + 605535.

It is an arithmetic number, because the mean of its divisors is an integer number (2158464).

Almost surely, 2^115639040 is an apocalyptic number.

115639040 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 115639040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155409408).

115639040 is an abundant number, since it is smaller than the sum of its proper divisors (195179776).

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

115639040 is a wasteful number, since it uses less digits than its factorization.

115639040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 115639040 is about 10753.5594107254. The cubic root of 115639040 is about 487.1935079839.

The spelling of 115639040 in words is "one hundred fifteen million, six hundred thirty-nine thousand, forty".