117811228 has 12 divisors (see below), whose sum is σ = 210964600. Its totient is φ = 57535632.

The previous prime is 117811193. The next prime is 117811231. The reversal of 117811228 is 822118711.

It is a self number, because there is not a number n which added to its sum of digits gives 117811228.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342303 + ... + 342646.

Almost surely, 2^117811228 is an apocalyptic number.

It is an amenable number.

117811228 is a deficient number, since it is larger than the sum of its proper divisors (93153372).

117811228 is a wasteful number, since it uses less digits than its factorization.

117811228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684996 (or 684994 counting only the distinct ones).

The product of its digits is 1792, while the sum is 31.

The square root of 117811228 is about 10854.0880777705. The cubic root of 117811228 is about 490.2251193820.

Adding to 117811228 its reverse (822118711), we get a palindrome (939929939).

The spelling of 117811228 in words is "one hundred seventeen million, eight hundred eleven thousand, two hundred twenty-eight".