115009840 has 40 divisors (see below), whose sum is σ = 291709008. Its totient is φ = 41821440.

The previous prime is 115009837. The next prime is 115009849. The reversal of 115009840 is 48900511.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 115009799 and 115009808.

It is not an unprimeable number, because it can be changed into a prime (115009849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64467 + ... + 66226.

Almost surely, 2^115009840 is an apocalyptic number.

115009840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115009840 is an abundant number, since it is smaller than the sum of its proper divisors (176699168).

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

115009840 is a wasteful number, since it uses less digits than its factorization.

115009840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130717 (or 130711 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 115009840 is about 10724.2640773155. The cubic root of 115009840 is about 486.3082826762.

The spelling of 115009840 in words is "one hundred fifteen million, nine thousand, eight hundred forty".