115881402 has 64 divisors (see below), whose sum is σ = 286513920. Its totient is φ = 30426624.

The previous prime is 115881397. The next prime is 115881407. The reversal of 115881402 is 204188511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (115881397) and next prime (115881407).

It is a self number, because there is not a number n which added to its sum of digits gives 115881402.

It is not an unprimeable number, because it can be changed into a prime (115881407) 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, 203374 + ... + 203942.

It is an arithmetic number, because the mean of its divisors is an integer number (4476780).

Almost surely, 2^115881402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115881402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143256960).

115881402 is an abundant number, since it is smaller than the sum of its proper divisors (170632518).

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

115881402 is a wasteful number, since it uses less digits than its factorization.

115881402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967.

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 115881402 is about 10764.8224323488. The cubic root of 115881402 is about 487.5336318678.

The spelling of 115881402 in words is "one hundred fifteen million, eight hundred eighty-one thousand, four hundred two".