228143847 has 4 divisors (see below), whose sum is σ = 304191800. Its totient is φ = 152095896.

The previous prime is 228143833. The next prime is 228143857. The reversal of 228143847 is 748341822.

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

It is a de Polignac number, because none of the positive numbers 2^k-228143847 is a prime.

It is a super-2 number, since 2×228143847² = 104099229847918818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228143827) 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, 38023972 + ... + 38023977.

It is an arithmetic number, because the mean of its divisors is an integer number (76047950).

Almost surely, 2^228143847 is an apocalyptic number.

228143847 is a deficient number, since it is larger than the sum of its proper divisors (76047953).

228143847 is an equidigital number, since it uses as much as digits as its factorization.

228143847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76047952.

The product of its digits is 86016, while the sum is 39.

The square root of 228143847 is about 15104.4313696345. The cubic root of 228143847 is about 611.0399237103.

The spelling of 228143847 in words is "two hundred twenty-eight million, one hundred forty-three thousand, eight hundred forty-seven".