864564340 has 12 divisors (see below), whose sum is σ = 1815585156. Its totient is φ = 345825728.

The previous prime is 864564329. The next prime is 864564361. The reversal of 864564340 is 43465468.

It can be written as a sum of positive squares in 2 ways, for example, as 667498896 + 197065444 = 25836^2 + 14038^2 .

It is a junction number, because it is equal to n+sod(n) for n = 864564293 and 864564302.

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 3 ways as a sum of consecutive naturals, for example, 21614089 + ... + 21614128.

It is an arithmetic number, because the mean of its divisors is an integer number (151298763).

Almost surely, 2^864564340 is an apocalyptic number.

It is an amenable number.

864564340 is an abundant number, since it is smaller than the sum of its proper divisors (951020816).

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

864564340 is a wasteful number, since it uses less digits than its factorization.

864564340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43228226 (or 43228224 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The square root of 864564340 is about 29403.4749647044. The cubic root of 864564340 is about 952.6479550087.

The spelling of 864564340 in words is "eight hundred sixty-four million, five hundred sixty-four thousand, three hundred forty".