28227632228 has 6 divisors (see below), whose sum is σ = 49398356406. Its totient is φ = 14113816112.

The previous prime is 28227632203. The next prime is 28227632239. The reversal of 28227632228 is 82223672282.

It can be written as a sum of positive squares in only one way, i.e., 28204515364 + 23116864 = 167942^2 + 4808^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3528454025 + ... + 3528454032.

It is an arithmetic number, because the mean of its divisors is an integer number (8233059401).

Almost surely, 2^28227632228 is an apocalyptic number.

It is an amenable number.

28227632228 is a deficient number, since it is larger than the sum of its proper divisors (21170724178).

28227632228 is a wasteful number, since it uses less digits than its factorization.

28227632228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7056908061 (or 7056908059 counting only the distinct ones).

The product of its digits is 516096, while the sum is 44.

The spelling of 28227632228 in words is "twenty-eight billion, two hundred twenty-seven million, six hundred thirty-two thousand, two hundred twenty-eight".