115551840 has 48 divisors (see below), whose sum is σ = 363989808. Its totient is φ = 30813696.

The previous prime is 115551827. The next prime is 115551857. The reversal of 115551840 is 48155511.

It is a tau number, because it is divible by the number of its divisors (48).

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 = 115551798 and 115551807.

It is a congruent number.

It is an unprimeable number.

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, 119887 + ... + 120846.

It is an arithmetic number, because the mean of its divisors is an integer number (7583121).

Almost surely, 2^115551840 is an apocalyptic number.

115551840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115551840 is an abundant number, since it is smaller than the sum of its proper divisors (248437968).

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

115551840 is a wasteful number, since it uses less digits than its factorization.

115551840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240751 (or 240743 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 30.

The square root of 115551840 is about 10749.5041746120. The cubic root of 115551840 is about 487.0710177568.

The spelling of 115551840 in words is "one hundred fifteen million, five hundred fifty-one thousand, eight hundred forty".