228872917 has 24 divisors (see below), whose sum is σ = 297338496. Its totient is φ = 171530784.

The previous prime is 228872899. The next prime is 228872933. The reversal of 228872917 is 719278822.

It is a happy number.

228872917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 228872917 - 2¹⁵ = 228840149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228872117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29368 + ... + 36334.

It is an arithmetic number, because the mean of its divisors is an integer number (12389104).

Almost surely, 2^228872917 is an apocalyptic number.

It is an amenable number.

228872917 is a deficient number, since it is larger than the sum of its proper divisors (68465579).

228872917 is a wasteful number, since it uses less digits than its factorization.

228872917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7025 (or 7006 counting only the distinct ones).

The product of its digits is 225792, while the sum is 46.

The square root of 228872917 is about 15128.5464272018. The cubic root of 228872917 is about 611.6901233950.

The spelling of 228872917 in words is "two hundred twenty-eight million, eight hundred seventy-two thousand, nine hundred seventeen".