228165864 has 32 divisors (see below), whose sum is σ = 579769440. Its totient is φ = 74808000.

The previous prime is 228165841. The next prime is 228165877. The reversal of 228165864 is 468561822.

It is a super-2 number, since 2×228165864² = 104119322989732992, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 76462 + ... + 79389.

It is an arithmetic number, because the mean of its divisors is an integer number (18117795).

Almost surely, 2^228165864 is an apocalyptic number.

228165864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

228165864 is an abundant number, since it is smaller than the sum of its proper divisors (351603576).

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

228165864 is a wasteful number, since it uses less digits than its factorization.

228165864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155921 (or 155917 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 228165864 is about 15105.1601778995. The cubic root of 228165864 is about 611.0595791943.

It can be divided in two parts, 22816 and 5864, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 228165864 in words is "two hundred twenty-eight million, one hundred sixty-five thousand, eight hundred sixty-four".