115743978 has 80 divisors (see below), whose sum is σ = 302596800. Its totient is φ = 33053832.

The previous prime is 115743977. The next prime is 115743983. The reversal of 115743978 is 879347511.

115743978 is a `hidden beast` number, since 1 + 1 + 574 + 3 + 9 + 78 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (115743977) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 54525 + ... + 56607.

It is an arithmetic number, because the mean of its divisors is an integer number (3782460).

Almost surely, 2^115743978 is an apocalyptic number.

115743978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 115743978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151298400).

115743978 is an abundant number, since it is smaller than the sum of its proper divisors (186852822).

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

115743978 is an equidigital number, since it uses as much as digits as its factorization.

115743978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118 (or 2095 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 115743978 is about 10758.4375259607. The cubic root of 115743978 is about 487.3408332455.

The spelling of 115743978 in words is "one hundred fifteen million, seven hundred forty-three thousand, nine hundred seventy-eight".