228130388 has 12 divisors (see below), whose sum is σ = 399412020. Its totient is φ = 114012672.

The previous prime is 228130379. The next prime is 228130393. The reversal of 228130388 is 883031822.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 39287824 + 188842564 = 6268^2 + 13742^2 .

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, 2381 + ... + 21492.

It is an arithmetic number, because the mean of its divisors is an integer number (33284335).

Almost surely, 2^228130388 is an apocalyptic number.

It is an amenable number.

228130388 is a deficient number, since it is larger than the sum of its proper divisors (171281632).

228130388 is a wasteful number, since it uses less digits than its factorization.

228130388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26266 (or 26264 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 228130388 is about 15103.9858315612. The cubic root of 228130388 is about 611.0279076830.

The spelling of 228130388 in words is "two hundred twenty-eight million, one hundred thirty thousand, three hundred eighty-eight".