228900643 has 4 divisors (see below), whose sum is σ = 231167088. Its totient is φ = 226634200.

The previous prime is 228900601. The next prime is 228900673. The reversal of 228900643 is 346009822.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228900643 - 2⁹ = 228900131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228900599 and 228900608.

It is not an unprimeable number, because it can be changed into a prime (228900673) 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, 1133071 + ... + 1133272.

It is an arithmetic number, because the mean of its divisors is an integer number (57791772).

Almost surely, 2^228900643 is an apocalyptic number.

228900643 is a deficient number, since it is larger than the sum of its proper divisors (2266445).

228900643 is a wasteful number, since it uses less digits than its factorization.

228900643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266444.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 228900643 is about 15129.4627465750. The cubic root of 228900643 is about 611.7148227432.

The spelling of 228900643 in words is "two hundred twenty-eight million, nine hundred thousand, six hundred forty-three".