116811280 has 40 divisors (see below), whose sum is σ = 274404312. Its totient is φ = 46239744.

The previous prime is 116811271. The next prime is 116811307. The reversal of 116811280 is 82118611.

It can be written as a sum of positive squares in 4 ways, for example, as 35378704 + 81432576 = 5948^2 + 9024^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234 + ... + 15286.

Almost surely, 2^116811280 is an apocalyptic number.

116811280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 116811280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137202156).

116811280 is an abundant number, since it is smaller than the sum of its proper divisors (157593032).

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

116811280 is a wasteful number, since it uses less digits than its factorization.

116811280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15163 (or 15157 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 28.

The square root of 116811280 is about 10807.9267206990. The cubic root of 116811280 is about 488.8342131998.

Adding to 116811280 its reverse (82118611), we get a palindrome (198929891).

The spelling of 116811280 in words is "one hundred sixteen million, eight hundred eleven thousand, two hundred eighty".