115542440 has 32 divisors (see below), whose sum is σ = 279969480. Its totient is φ = 42661632.

The previous prime is 115542437. The next prime is 115542451. The reversal of 115542440 is 44245511.

It can be written as a sum of positive squares in 4 ways, for example, as 96550276 + 18992164 = 9826^2 + 4358^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110579 + ... + 111618.

Almost surely, 2^115542440 is an apocalyptic number.

115542440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115542440 is an abundant number, since it is smaller than the sum of its proper divisors (164427040).

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

115542440 is a wasteful number, since it uses less digits than its factorization.

115542440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222221 (or 222217 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 115542440 is about 10749.0669362508. The cubic root of 115542440 is about 487.0578098559.

Adding to 115542440 its reverse (44245511), we get a palindrome (159787951).

The spelling of 115542440 in words is "one hundred fifteen million, five hundred forty-two thousand, four hundred forty".