115543890 has 96 divisors (see below), whose sum is σ = 374564736. Its totient is φ = 24007680.

The previous prime is 115543867. The next prime is 115543903. The reversal of 115543890 is 98345511.

115543890 is a `hidden beast` number, since 11 + 554 + 3 + 8 + 90 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1407 + ... + 15266.

It is an arithmetic number, because the mean of its divisors is an integer number (3901716).

Almost surely, 2^115543890 is an apocalyptic number.

115543890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 115543890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187282368).

115543890 is an abundant number, since it is smaller than the sum of its proper divisors (259020846).

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

115543890 is a wasteful number, since it uses less digits than its factorization.

115543890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16704 (or 16701 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 115543890 is about 10749.1343837539. The cubic root of 115543890 is about 487.0598472916.

The spelling of 115543890 in words is "one hundred fifteen million, five hundred forty-three thousand, eight hundred ninety".