115720110 has 128 divisors (see below), whose sum is σ = 344217600. Its totient is φ = 27423360.

The previous prime is 115720103. The next prime is 115720123. The reversal of 115720110 is 11027511.

It is a happy number.

It is a super-2 number, since 2×115720110² = 26782287716824200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 139176 + ... + 140004.

It is an arithmetic number, because the mean of its divisors is an integer number (2689200).

Almost surely, 2^115720110 is an apocalyptic number.

115720110 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 115720110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172108800).

115720110 is an abundant number, since it is smaller than the sum of its proper divisors (228497490).

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

115720110 is a wasteful number, since it uses less digits than its factorization.

115720110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 115720110 is about 10757.3281998831. The cubic root of 115720110 is about 487.3073321486.

Adding to 115720110 its reverse (11027511), we get a palindrome (126747621).

The spelling of 115720110 in words is "one hundred fifteen million, seven hundred twenty thousand, one hundred ten".