228436947 has 12 divisors (see below), whose sum is σ = 330627024. Its totient is φ = 151985520.

The previous prime is 228436931. The next prime is 228436961. The reversal of 228436947 is 749634822.

228436947 is a `hidden beast` number, since 2 + 284 + 369 + 4 + 7 = 666.

It is not a de Polignac number, because 228436947 - 2⁴ = 228436931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228436907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20704 + ... + 29757.

It is an arithmetic number, because the mean of its divisors is an integer number (27552252).

Almost surely, 2^228436947 is an apocalyptic number.

228436947 is a deficient number, since it is larger than the sum of its proper divisors (102190077).

228436947 is a wasteful number, since it uses less digits than its factorization.

228436947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50970 (or 50967 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 228436947 is about 15114.1307060644. The cubic root of 228436947 is about 611.3014826097.

The spelling of 228436947 in words is "two hundred twenty-eight million, four hundred thirty-six thousand, nine hundred forty-seven".