115719990 has 64 divisors (see below), whose sum is σ = 283944960. Its totient is φ = 30176640.

The previous prime is 115719971. The next prime is 115719991. The reversal of 115719990 is 99917511.

It is a happy number.

It is a super-2 number, since 2×115719990² = 26782232171200200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115719991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 371935 + ... + 372245.

It is an arithmetic number, because the mean of its divisors is an integer number (4436640).

Almost surely, 2^115719990 is an apocalyptic number.

115719990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115719990 is an abundant number, since it is smaller than the sum of its proper divisors (168224970).

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

115719990 is a wasteful number, since it uses less digits than its factorization.

115719990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557.

The product of its (nonzero) digits is 25515, while the sum is 42.

The square root of 115719990 is about 10757.3226222885. The cubic root of 115719990 is about 487.3071637051.

The spelling of 115719990 in words is "one hundred fifteen million, seven hundred nineteen thousand, nine hundred ninety".