228015278 has 4 divisors (see below), whose sum is σ = 342022920. Its totient is φ = 114007638.

The previous prime is 228015239. The next prime is 228015289. The reversal of 228015278 is 872510822.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57003818 + ... + 57003821.

It is an arithmetic number, because the mean of its divisors is an integer number (85505730).

Almost surely, 2^228015278 is an apocalyptic number.

228015278 is a deficient number, since it is larger than the sum of its proper divisors (114007642).

228015278 is a wasteful number, since it uses less digits than its factorization.

228015278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114007641.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 228015278 is about 15100.1747672005. The cubic root of 228015278 is about 610.9251196001.

It can be divided in two parts, 228015 and 278, that multiplied together give a triangular number (63388170 = T₁₁₂₅₉).

The spelling of 228015278 in words is "two hundred twenty-eight million, fifteen thousand, two hundred seventy-eight".