115541440 has 56 divisors (see below), whose sum is σ = 314443872. Its totient is φ = 39613440.

The previous prime is 115541359. The next prime is 115541441. The reversal of 115541440 is 44145511.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115541441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23551 + ... + 28030.

Almost surely, 2^115541440 is an apocalyptic number.

115541440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115541440 is an abundant number, since it is smaller than the sum of its proper divisors (198902432).

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

115541440 is an equidigital number, since it uses as much as digits as its factorization.

115541440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51605 (or 51595 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 115541440 is about 10749.0204204848. The cubic root of 115541440 is about 487.0564047180.

Adding to 115541440 its reverse (44145511), we get a palindrome (159686951).

The spelling of 115541440 in words is "one hundred fifteen million, five hundred forty-one thousand, four hundred forty".