117212280 has 64 divisors (see below), whose sum is σ = 372327840. Its totient is φ = 29417472.

The previous prime is 117212269. The next prime is 117212299. The reversal of 117212280 is 82212711.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 117212280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26689 + ... + 30768.

Almost surely, 2^117212280 is an apocalyptic number.

117212280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117212280 is an abundant number, since it is smaller than the sum of its proper divisors (255115560).

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

117212280 is a wasteful number, since it uses less digits than its factorization.

117212280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57488 (or 57484 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 117212280 is about 10826.4620259806. The cubic root of 117212280 is about 489.3929453090.

Adding to 117212280 its reverse (82212711), we get a palindrome (199424991).

The spelling of 117212280 in words is "one hundred seventeen million, two hundred twelve thousand, two hundred eighty".