228117765 has 32 divisors (see below), whose sum is σ = 377677440. Its totient is φ = 117483264.

The previous prime is 228117763. The next prime is 228117803. The reversal of 228117765 is 567711822.

It is not a de Polignac number, because 228117765 - 2¹ = 228117763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228117763) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 75667 + ... + 78623.

It is an arithmetic number, because the mean of its divisors is an integer number (11802420).

Almost surely, 2^228117765 is an apocalyptic number.

It is an amenable number.

228117765 is a deficient number, since it is larger than the sum of its proper divisors (149559675).

228117765 is a wasteful number, since it uses less digits than its factorization.

228117765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3141.

The product of its digits is 47040, while the sum is 39.

The square root of 228117765 is about 15103.5679559500. The cubic root of 228117765 is about 611.0166375966.

The spelling of 228117765 in words is "two hundred twenty-eight million, one hundred seventeen thousand, seven hundred sixty-five".