228213456 has 20 divisors (see below), whose sum is σ = 589551552. Its totient is φ = 76071136.

The previous prime is 228213451. The next prime is 228213487. The reversal of 228213456 is 654312822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228213451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2377176 + ... + 2377271.

Almost surely, 2^228213456 is an apocalyptic number.

It is an amenable number.

228213456 is an abundant number, since it is smaller than the sum of its proper divisors (361338096).

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

228213456 is a wasteful number, since it uses less digits than its factorization.

228213456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4754458 (or 4754452 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 228213456 is about 15106.7354514468. The cubic root of 228213456 is about 611.1020622156.

The spelling of 228213456 in words is "two hundred twenty-eight million, two hundred thirteen thousand, four hundred fifty-six".