115605840 has 80 divisors (see below), whose sum is σ = 409580928. Its totient is φ = 26423808.

The previous prime is 115605829. The next prime is 115605859. The reversal of 115605840 is 48506511.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 115605798 and 115605807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32727 + ... + 36086.

Almost surely, 2^115605840 is an apocalyptic number.

115605840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115605840 is an abundant number, since it is smaller than the sum of its proper divisors (293975088).

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

115605840 is a wasteful number, since it uses less digits than its factorization.

115605840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68836 (or 68830 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 115605840 is about 10752.0156249886. The cubic root of 115605840 is about 487.1468790581.

The spelling of 115605840 in words is "one hundred fifteen million, six hundred five thousand, eight hundred forty".