115228240 has 80 divisors (see below), whose sum is σ = 279982080. Its totient is φ = 44052480.

The previous prime is 115228213. The next prime is 115228241. The reversal of 115228240 is 42822511.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115228241) 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, 240321 + ... + 240799.

It is an arithmetic number, because the mean of its divisors is an integer number (3499776).

Almost surely, 2^115228240 is an apocalyptic number.

115228240 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 115228240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139991040).

115228240 is an abundant number, since it is smaller than the sum of its proper divisors (164753840).

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

115228240 is a wasteful number, since it uses less digits than its factorization.

115228240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 115228240 is about 10734.4417647123. The cubic root of 115228240 is about 486.6159159772.

It can be divided in two parts, 1152 and 28240, that added together give a palindrome (29392).

The spelling of 115228240 in words is "one hundred fifteen million, two hundred twenty-eight thousand, two hundred forty".