115732240 has 80 divisors (see below), whose sum is σ = 291575088. Its totient is φ = 42467328.

The previous prime is 115732223. The next prime is 115732241. The reversal of 115732240 is 42237511.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2862864 + 112869376 = 1692^2 + 10624^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (115732241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267064 + ... + 267496.

Almost surely, 2^115732240 is an apocalyptic number.

115732240 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 115732240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145787544).

115732240 is an abundant number, since it is smaller than the sum of its proper divisors (175842848).

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

115732240 is a wasteful number, since it uses less digits than its factorization.

115732240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 115732240 is about 10757.8919868160. The cubic root of 115732240 is about 487.3243583780.

Adding to 115732240 its reverse (42237511), we get a palindrome (157969751).

The spelling of 115732240 in words is "one hundred fifteen million, seven hundred thirty-two thousand, two hundred forty".