227428993 has 16 divisors (see below), whose sum is σ = 261915840. Its totient is φ = 195307200.

The previous prime is 227428963. The next prime is 227429017. The reversal of 227428993 is 399824722.

It is a de Polignac number, because none of the positive numbers 2^k-227428993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (227428963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81603 + ... + 84343.

It is an arithmetic number, because the mean of its divisors is an integer number (16369740).

Almost surely, 2^227428993 is an apocalyptic number.

It is an amenable number.

227428993 is a deficient number, since it is larger than the sum of its proper divisors (34486847).

227428993 is a wasteful number, since it uses less digits than its factorization.

227428993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3168.

The product of its digits is 435456, while the sum is 46.

The square root of 227428993 is about 15080.7490861694. The cubic root of 227428993 is about 610.4010557984.

The spelling of 227428993 in words is "two hundred twenty-seven million, four hundred twenty-eight thousand, nine hundred ninety-three".