228117656 has 16 divisors (see below), whose sum is σ = 460622400. Its totient is φ = 105285024.

The previous prime is 228117607. The next prime is 228117661. The reversal of 228117656 is 656711822.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1096616 + ... + 1096823.

It is an arithmetic number, because the mean of its divisors is an integer number (28788900).

Almost surely, 2^228117656 is an apocalyptic number.

228117656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

228117656 is an abundant number, since it is smaller than the sum of its proper divisors (232504744).

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

228117656 is a wasteful number, since it uses less digits than its factorization.

228117656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2193458 (or 2193454 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 228117656 is about 15103.5643475307. The cubic root of 228117656 is about 611.0165402772.

The spelling of 228117656 in words is "two hundred twenty-eight million, one hundred seventeen thousand, six hundred fifty-six".