228165478 has 4 divisors (see below), whose sum is σ = 342248220. Its totient is φ = 114082738.

The previous prime is 228165467. The next prime is 228165479. The reversal of 228165478 is 874561822.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228165479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57041368 + ... + 57041371.

It is an arithmetic number, because the mean of its divisors is an integer number (85562055).

Almost surely, 2^228165478 is an apocalyptic number.

228165478 is a deficient number, since it is larger than the sum of its proper divisors (114082742).

228165478 is a wasteful number, since it uses less digits than its factorization.

228165478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114082741.

The product of its digits is 215040, while the sum is 43.

The square root of 228165478 is about 15105.1474008035. The cubic root of 228165478 is about 611.0592346071.

The spelling of 228165478 in words is "two hundred twenty-eight million, one hundred sixty-five thousand, four hundred seventy-eight".