118808820 has 72 divisors (see below), whose sum is σ = 388116456. Its totient is φ = 29244672.

The previous prime is 118808819. The next prime is 118808821. The reversal of 118808820 is 28808811.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (118808819) and next prime (118808821).

It can be written as a sum of positive squares in 4 ways, for example, as 8054244 + 110754576 = 2838^2 + 10524^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118808821) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 23047 + ... + 27726.

Almost surely, 2^118808820 is an apocalyptic number.

118808820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

118808820 is an abundant number, since it is smaller than the sum of its proper divisors (269307636).

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

118808820 is a wasteful number, since it uses less digits than its factorization.

118808820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50801 (or 50796 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 36.

The square root of 118808820 is about 10899.9458714252. The cubic root of 118808820 is about 491.6049277388.

Subtracting from 118808820 its reverse (28808811), we obtain a palindrome (90000009).

The spelling of 118808820 in words is "one hundred eighteen million, eight hundred eight thousand, eight hundred twenty".