4228731999 has 24 divisors (see below), whose sum is σ = 6394332672. Its totient is φ = 2687871120.

The previous prime is 4228731973. The next prime is 4228732003. The reversal of 4228731999 is 9991378224.

4228731999 is a `hidden beast` number, since 42 + 287 + 319 + 9 + 9 = 666.

It is not a de Polignac number, because 4228731999 - 2⁸ = 4228731743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4228731919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31534 + ... + 97220.

It is an arithmetic number, because the mean of its divisors is an integer number (266430528).

Almost surely, 2^4228731999 is an apocalyptic number.

4228731999 is a deficient number, since it is larger than the sum of its proper divisors (2165600673).

4228731999 is a wasteful number, since it uses less digits than its factorization.

4228731999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66027 (or 66024 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 4228731999 is about 65028.7013479433. The cubic root of 4228731999 is about 1617.0994175665.

The spelling of 4228731999 in words is "four billion, two hundred twenty-eight million, seven hundred thirty-one thousand, nine hundred ninety-nine".