228728186370 has 80 divisors (see below), whose sum is σ = 615278370168. Its totient is φ = 60969024000.

The previous prime is 228728186359. The next prime is 228728186387. The reversal of 228728186370 is 73681827822.

228728186370 is a `hidden beast` number, since 2 + 28 + 72 + 8 + 186 + 370 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 201068837649 + 27659348721 = 448407^2 + 166311^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1949370 + ... + 2063370.

Almost surely, 2^228728186370 is an apocalyptic number.

228728186370 is an abundant number, since it is smaller than the sum of its proper divisors (386550183798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228728186370 is a wasteful number, since it uses less digits than its factorization.

228728186370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116497 (or 116488 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 228728186370 in words is "two hundred twenty-eight billion, seven hundred twenty-eight million, one hundred eighty-six thousand, three hundred seventy".