228288639766 has 8 divisors (see below), whose sum is σ = 373563228744. Its totient is φ = 103767563520.

The previous prime is 228288639751. The next prime is 228288639809. The reversal of 228288639766 is 667936882822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5188378155 + ... + 5188378198.

It is an arithmetic number, because the mean of its divisors is an integer number (46695403593).

Almost surely, 2^228288639766 is an apocalyptic number.

228288639766 is a deficient number, since it is larger than the sum of its proper divisors (145274588978).

228288639766 is a wasteful number, since it uses less digits than its factorization.

228288639766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10376756366.

The product of its digits is 167215104, while the sum is 67.

The spelling of 228288639766 in words is "two hundred twenty-eight billion, two hundred eighty-eight million, six hundred thirty-nine thousand, seven hundred sixty-six".