78667228 has 24 divisors (see below), whose sum is σ = 146059200. Its totient is φ = 36945408.

The previous prime is 78667207. The next prime is 78667231. The reversal of 78667228 is 82276687.

It is a super-3 number, since 3×78667228³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48088 + ... + 49696.

It is an arithmetic number, because the mean of its divisors is an integer number (6085800).

Almost surely, 2^78667228 is an apocalyptic number.

It is an amenable number.

78667228 is a deficient number, since it is larger than the sum of its proper divisors (67391972).

78667228 is a wasteful number, since it uses less digits than its factorization.

78667228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349 (or 2347 counting only the distinct ones).

The product of its digits is 451584, while the sum is 46.

The square root of 78667228 is about 8869.4547746747. The cubic root of 78667228 is about 428.4807173306.

The spelling of 78667228 in words is "seventy-eight million, six hundred sixty-seven thousand, two hundred twenty-eight".