115554640 has 40 divisors (see below), whose sum is σ = 269346600. Its totient is φ = 46104576.

The previous prime is 115554629. The next prime is 115554641. The reversal of 115554640 is 46455511.

It can be written as a sum of positive squares in 4 ways, for example, as 38044224 + 77510416 = 6168^2 + 8804^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115554641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34312 + ... + 37528.

It is an arithmetic number, because the mean of its divisors is an integer number (6733665).

Almost surely, 2^115554640 is an apocalyptic number.

115554640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115554640 is an abundant number, since it is smaller than the sum of its proper divisors (153791960).

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

115554640 is a wasteful number, since it uses less digits than its factorization.

115554640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3679 (or 3673 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 115554640 is about 10749.6344123882. The cubic root of 115554640 is about 487.0749518866.

The spelling of 115554640 in words is "one hundred fifteen million, five hundred fifty-four thousand, six hundred forty".