864171572 has 24 divisors (see below), whose sum is σ = 1680914592. Its totient is φ = 385392800.

The previous prime is 864171569. The next prime is 864171587. The reversal of 864171572 is 275171468.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182954 + ... + 187617.

It is an arithmetic number, because the mean of its divisors is an integer number (70038108).

Almost surely, 2^864171572 is an apocalyptic number.

It is an amenable number.

864171572 is a deficient number, since it is larger than the sum of its proper divisors (816743020).

864171572 is a wasteful number, since it uses less digits than its factorization.

864171572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370639 (or 370637 counting only the distinct ones).

The product of its digits is 94080, while the sum is 41.

The square root of 864171572 is about 29396.7952675117. The cubic root of 864171572 is about 952.5036718169.

The spelling of 864171572 in words is "eight hundred sixty-four million, one hundred seventy-one thousand, five hundred seventy-two".