228428428 has 6 divisors (see below), whose sum is σ = 399749756. Its totient is φ = 114214212.

The previous prime is 228428407. The next prime is 228428437. The reversal of 228428428 is 824824822.

228428428 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28553550 + ... + 28553557.

Almost surely, 2^228428428 is an apocalyptic number.

It is an amenable number.

228428428 is a deficient number, since it is larger than the sum of its proper divisors (171321328).

228428428 is a wasteful number, since it uses less digits than its factorization.

228428428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57107111 (or 57107109 counting only the distinct ones).

The product of its digits is 131072, while the sum is 40.

The square root of 228428428 is about 15113.8488810759. The cubic root of 228428428 is about 611.2938835149.

The spelling of 228428428 in words is "two hundred twenty-eight million, four hundred twenty-eight thousand, four hundred twenty-eight".