228917049 has 4 divisors (see below), whose sum is σ = 305222736. Its totient is φ = 152611364.

The previous prime is 228917047. The next prime is 228917077. The reversal of 228917049 is 940719822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228917049 - 2¹ = 228917047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228917049.

It is not an unprimeable number, because it can be changed into a prime (228917047) 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, 38152839 + ... + 38152844.

It is an arithmetic number, because the mean of its divisors is an integer number (76305684).

Almost surely, 2^228917049 is an apocalyptic number.

It is an amenable number.

228917049 is a deficient number, since it is larger than the sum of its proper divisors (76305687).

228917049 is an equidigital number, since it uses as much as digits as its factorization.

228917049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76305686.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 228917049 is about 15130.0049239913. The cubic root of 228917049 is about 611.7294368766.

The spelling of 228917049 in words is "two hundred twenty-eight million, nine hundred seventeen thousand, forty-nine".