228167765 has 24 divisors (see below), whose sum is σ = 321820632. Its totient is φ = 154828800.

The previous prime is 228167759. The next prime is 228167767. The reversal of 228167765 is 567761822.

It can be written as a sum of positive squares in 4 ways, for example, as 41654116 + 186513649 = 6454^2 + 13657^2 .

It is not a de Polignac number, because 228167765 - 2¹² = 228163669 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228167767) 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 23 ways as a sum of consecutive naturals, for example, 18965 + ... + 28565.

It is an arithmetic number, because the mean of its divisors is an integer number (13409193).

Almost surely, 2^228167765 is an apocalyptic number.

It is an amenable number.

228167765 is a deficient number, since it is larger than the sum of its proper divisors (93652867).

228167765 is an equidigital number, since it uses as much as digits as its factorization.

228167765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9717 (or 9710 counting only the distinct ones).

The product of its digits is 282240, while the sum is 44.

The square root of 228167765 is about 15105.2231032845. The cubic root of 228167765 is about 611.0612762361.

The spelling of 228167765 in words is "two hundred twenty-eight million, one hundred sixty-seven thousand, seven hundred sixty-five".