864420705 has 24 divisors (see below), whose sum is σ = 1506621480. Its totient is φ = 458472960.

The previous prime is 864420673. The next prime is 864420731. The reversal of 864420705 is 507024468.

864420705 is a `hidden beast` number, since 8 + 644 + 2 + 0 + 7 + 0 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 589824 + 863830881 = 768^2 + 29391^2 .

It is not a de Polignac number, because 864420705 - 2⁵ = 864420673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864420705.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44920 + ... + 61209.

It is an arithmetic number, because the mean of its divisors is an integer number (62775895).

Almost surely, 2^864420705 is an apocalyptic number.

It is an amenable number.

864420705 is a deficient number, since it is larger than the sum of its proper divisors (642200775).

864420705 is a wasteful number, since it uses less digits than its factorization.

864420705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106321 (or 106318 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 864420705 is about 29401.0323798332. The cubic root of 864420705 is about 952.5951958093.

The spelling of 864420705 in words is "eight hundred sixty-four million, four hundred twenty thousand, seven hundred five".