864609426 has 24 divisors (see below), whose sum is σ = 1983516444. Its totient is φ = 271249920.

The previous prime is 864609419. The next prime is 864609439. The reversal of 864609426 is 624906468.

864609426 is a `hidden beast` number, since 86 + 460 + 94 + 26 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 861716025 + 2893401 = 29355^2 + 1701^2 .

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 11 ways as a sum of consecutive naturals, for example, 1412455 + ... + 1413066.

Almost surely, 2^864609426 is an apocalyptic number.

864609426 is an abundant number, since it is smaller than the sum of its proper divisors (1118907018).

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

864609426 is a wasteful number, since it uses less digits than its factorization.

864609426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825546 (or 2825543 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 864609426 is about 29404.2416327985. The cubic root of 864609426 is about 952.6645145394.

The spelling of 864609426 in words is "eight hundred sixty-four million, six hundred nine thousand, four hundred twenty-six".