872657985 has 48 divisors (see below), whose sum is σ = 1442952000. Its totient is φ = 450308352.

The previous prime is 872657971. The next prime is 872658001. The reversal of 872657985 is 589756278.

It is a happy number.

It is not a de Polignac number, because 872657985 - 2⁴ = 872657969 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5856691 + ... + 5856839.

It is an arithmetic number, because the mean of its divisors is an integer number (30061500).

Almost surely, 2^872657985 is an apocalyptic number.

It is an amenable number.

872657985 is a deficient number, since it is larger than the sum of its proper divisors (570294015).

872657985 is a wasteful number, since it uses less digits than its factorization.

872657985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 349 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 57.

The square root of 872657985 is about 29540.7851114353. The cubic root of 872657985 is about 955.6114739350.

The spelling of 872657985 in words is "eight hundred seventy-two million, six hundred fifty-seven thousand, nine hundred eighty-five".