1000491838 has 16 divisors (see below), whose sum is σ = 1524401424. Its totient is φ = 492370560.

The previous prime is 1000491827. The next prime is 1000491841. The reversal of 1000491838 is 8381940001.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217078 + ... + 221638.

It is an arithmetic number, because the mean of its divisors is an integer number (95275089).

Almost surely, 2^1000491838 is an apocalyptic number.

1000491838 is a deficient number, since it is larger than the sum of its proper divisors (523909586).

1000491838 is a wasteful number, since it uses less digits than its factorization.

1000491838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6267.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1000491838 is about 31630.5522873060. The cubic root of 1000491838 is about 1000.1639191291.

The spelling of 1000491838 in words is "one billion, four hundred ninety-one thousand, eight hundred thirty-eight".