118628865 has 12 divisors (see below), whose sum is σ = 205623444. Its totient is φ = 63268704.

The previous prime is 118628863. The next prime is 118628891. The reversal of 118628865 is 568826811.

118628865 is a `hidden beast` number, since 1 + 18 + 628 + 8 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18948609 + 99680256 = 4353^2 + 9984^2 .

It is not a de Polignac number, because 118628865 - 2¹ = 118628863 is a prime.

It is a super-2 number, since 2×118628865² = 28145615222376450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 2636197 = 118628865 / (1 + 1 + 8 + 6 + 2 + 8 + 8 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 118628865.

It is not an unprimeable number, because it can be changed into a prime (118628863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1318054 + ... + 1318143.

It is an arithmetic number, because the mean of its divisors is an integer number (17135287).

Almost surely, 2^118628865 is an apocalyptic number.

118628865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

118628865 is a deficient number, since it is larger than the sum of its proper divisors (86994579).

118628865 is a wasteful number, since it uses less digits than its factorization.

118628865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636208 (or 2636205 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 118628865 is about 10891.6878857228. The cubic root of 118628865 is about 491.3565974995.

The spelling of 118628865 in words is "one hundred eighteen million, six hundred twenty-eight thousand, eight hundred sixty-five".