228308647 has 6 divisors (see below), whose sum is σ = 260969864. Its totient is φ = 195658860.

The previous prime is 228308627. The next prime is 228308651. The reversal of 228308647 is 746803822.

It is not a de Polignac number, because 228308647 - 2⁷ = 228308519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228308627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37122 + ... + 42832.

Almost surely, 2^228308647 is an apocalyptic number.

228308647 is a deficient number, since it is larger than the sum of its proper divisors (32661217).

228308647 is an frugal number, since it uses more digits than its factorization.

228308647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11429 (or 5718 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 228308647 is about 15109.8857374899. The cubic root of 228308647 is about 611.1870167887.

The spelling of 228308647 in words is "two hundred twenty-eight million, three hundred eight thousand, six hundred forty-seven".