803991138 has 16 divisors (see below), whose sum is σ = 1659853056. Its totient is φ = 259351920.

The previous prime is 803991127. The next prime is 803991187. The reversal of 803991138 is 831199308.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 803991138.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2161081 + ... + 2161452.

It is an arithmetic number, because the mean of its divisors is an integer number (103740816).

Almost surely, 2^803991138 is an apocalyptic number.

803991138 is an abundant number, since it is smaller than the sum of its proper divisors (855861918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

803991138 is a wasteful number, since it uses less digits than its factorization.

803991138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4322569.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 803991138 is about 28354.7374877638. The cubic root of 803991138 is about 929.8589750319.

The spelling of 803991138 in words is "eight hundred three million, nine hundred ninety-one thousand, one hundred thirty-eight".