117186228 has 36 divisors (see below), whose sum is σ = 302527680. Its totient is φ = 38230416.

The previous prime is 117186203. The next prime is 117186257. The reversal of 117186228 is 822681711.

117186228 is a `hidden beast` number, since 1 + 17 + 18 + 622 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×117186228² = 27465224065735968, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 117186192 and 117186201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32938 + ... + 36321.

Almost surely, 2^117186228 is an apocalyptic number.

117186228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

117186228 is an abundant number, since it is smaller than the sum of its proper divisors (185341452).

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

117186228 is a wasteful number, since it uses less digits than its factorization.

117186228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69316 (or 69311 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 117186228 is about 10825.2587959827. The cubic root of 117186228 is about 489.3566845756.

The spelling of 117186228 in words is "one hundred seventeen million, one hundred eighty-six thousand, two hundred twenty-eight".