228415917 has 8 divisors (see below), whose sum is σ = 308224224. Its totient is φ = 150442448.

The previous prime is 228415909. The next prime is 228415933. The reversal of 228415917 is 719514822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228415917 - 2³ = 228415909 is a prime.

It is a super-2 number, since 2×228415917² = 104347662277901778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228415937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458418 + ... + 458915.

It is an arithmetic number, because the mean of its divisors is an integer number (38528028).

Almost surely, 2^228415917 is an apocalyptic number.

It is an amenable number.

228415917 is a deficient number, since it is larger than the sum of its proper divisors (79808307).

228415917 is an equidigital number, since it uses as much as digits as its factorization.

228415917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917419.

The product of its digits is 40320, while the sum is 39.

The square root of 228415917 is about 15113.4349834841. The cubic root of 228415917 is about 611.2827231447.

The spelling of 228415917 in words is "two hundred twenty-eight million, four hundred fifteen thousand, nine hundred seventeen".