9999287438 has 32 divisors (see below), whose sum is σ = 17316203520. Its totient is φ = 4241846880.

The previous prime is 9999287437. The next prime is 9999287447. The reversal of 9999287438 is 8347829999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999287437) 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, 1875845 + ... + 1881167.

It is an arithmetic number, because the mean of its divisors is an integer number (541131360).

Almost surely, 2^9999287438 is an apocalyptic number.

9999287438 is a deficient number, since it is larger than the sum of its proper divisors (7316916082).

9999287438 is a wasteful number, since it uses less digits than its factorization.

9999287438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672.

The product of its digits is 70543872, while the sum is 68.

The square root of 9999287438 is about 99996.4371265297. The cubic root of 9999287438 is about 2154.3835165400.

The spelling of 9999287438 in words is "nine billion, nine hundred ninety-nine million, two hundred eighty-seven thousand, four hundred thirty-eight".