849599638 has 4 divisors (see below), whose sum is σ = 1274399460. Its totient is φ = 424799818.

The previous prime is 849599629. The next prime is 849599657. The reversal of 849599638 is 836995948.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212399908 + ... + 212399911.

It is an arithmetic number, because the mean of its divisors is an integer number (318599865).

Almost surely, 2^849599638 is an apocalyptic number.

849599638 is a deficient number, since it is larger than the sum of its proper divisors (424799822).

849599638 is a wasteful number, since it uses less digits than its factorization.

849599638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424799821.

The product of its digits is 16796160, while the sum is 61.

The square root of 849599638 is about 29147.8925138680. The cubic root of 849599638 is about 947.1194882582.

The spelling of 849599638 in words is "eight hundred forty-nine million, five hundred ninety-nine thousand, six hundred thirty-eight".