228140428 has 6 divisors (see below), whose sum is σ = 399245756. Its totient is φ = 114070212.

The previous prime is 228140401. The next prime is 228140443. The reversal of 228140428 is 824041822.

It is a self number, because there is not a number n which added to its sum of digits gives 228140428.

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 as a sum of consecutive naturals, namely, 28517550 + ... + 28517557.

Almost surely, 2^228140428 is an apocalyptic number.

It is an amenable number.

228140428 is a deficient number, since it is larger than the sum of its proper divisors (171105328).

228140428 is a wasteful number, since it uses less digits than its factorization.

228140428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57035111 (or 57035109 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 228140428 is about 15104.3181905043. The cubic root of 228140428 is about 611.0368713145.

The spelling of 228140428 in words is "two hundred twenty-eight million, one hundred forty thousand, four hundred twenty-eight".