872017990 has 16 divisors (see below), whose sum is σ = 1570071600. Its totient is φ = 348709600.

The previous prime is 872017987. The next prime is 872018033. The reversal of 872017990 is 99710278.

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, 33465 + ... + 53515.

It is an arithmetic number, because the mean of its divisors is an integer number (98129475).

Almost surely, 2^872017990 is an apocalyptic number.

872017990 is a deficient number, since it is larger than the sum of its proper divisors (698053610).

872017990 is a wasteful number, since it uses less digits than its factorization.

872017990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24407.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 872017990 is about 29529.9507280320. The cubic root of 872017990 is about 955.3778061651.

The spelling of 872017990 in words is "eight hundred seventy-two million, seventeen thousand, nine hundred ninety".