228128512 has 36 divisors (see below), whose sum is σ = 456331176. Its totient is φ = 113822720.

The previous prime is 228128503. The next prime is 228128521. The reversal of 228128512 is 215821822.

It is an interprime number because it is at equal distance from previous prime (228128503) and next prime (228128521).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 240423 + ... + 241369.

It is an arithmetic number, because the mean of its divisors is an integer number (12675866).

Almost surely, 2^228128512 is an apocalyptic number.

It is an amenable number.

228128512 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

228128512 is an frugal number, since it uses more digits than its factorization.

228128512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904 (or 1890 counting only the distinct ones).

The product of its digits is 5120, while the sum is 31.

The square root of 228128512 is about 15103.9237286210. The cubic root of 228128512 is about 611.0262327761.

The spelling of 228128512 in words is "two hundred twenty-eight million, one hundred twenty-eight thousand, five hundred twelve".