864067864 has 64 divisors (see below), whose sum is σ = 1941408000. Its totient is φ = 355893120.

The previous prime is 864067859. The next prime is 864067873. The reversal of 864067864 is 468760468.

It is a super-2 number, since 2×864067864² = 1493226547195044992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27222 + ... + 49690.

It is an arithmetic number, because the mean of its divisors is an integer number (30334500).

Almost surely, 2^864067864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864067864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970704000).

864067864 is an abundant number, since it is smaller than the sum of its proper divisors (1077340136).

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

864067864 is a wasteful number, since it uses less digits than its factorization.

864067864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22528 (or 22524 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 49.

The square root of 864067864 is about 29395.0312808134. The cubic root of 864067864 is about 952.4655674227.

The spelling of 864067864 in words is "eight hundred sixty-four million, sixty-seven thousand, eight hundred sixty-four".