115987798 has 4 divisors (see below), whose sum is σ = 173981700. Its totient is φ = 57993898.

The previous prime is 115987777. The next prime is 115987829. The reversal of 115987798 is 897789511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 897789511 = 29 ⋅30958259.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28996948 + ... + 28996951.

It is an arithmetic number, because the mean of its divisors is an integer number (43495425).

Almost surely, 2^115987798 is an apocalyptic number.

115987798 is a deficient number, since it is larger than the sum of its proper divisors (57993902).

115987798 is an equidigital number, since it uses as much as digits as its factorization.

115987798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57993901.

The product of its digits is 1270080, while the sum is 55.

The square root of 115987798 is about 10769.7631357426. The cubic root of 115987798 is about 487.6827951797.

It can be divided in two parts, 11 and 5987798, that added together give a square (5987809 = 2447²).

The spelling of 115987798 in words is "one hundred fifteen million, nine hundred eighty-seven thousand, seven hundred ninety-eight".