1229705664 has 56 divisors (see below), whose sum is σ = 3549383808. Its totient is φ = 372637440.

The previous prime is 1229705657. The next prime is 1229705677. The reversal of 1229705664 is 4665079221.

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, 289012 + ... + 293235.

Almost surely, 2^1229705664 is an apocalyptic number.

It is an amenable number.

1229705664 is an abundant number, since it is smaller than the sum of its proper divisors (2319678144).

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

1229705664 is a wasteful number, since it uses less digits than its factorization.

1229705664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582273 (or 582263 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 1229705664 is about 35067.1593374770. The cubic root of 1229705664 is about 1071.3557984452.

The spelling of 1229705664 in words is "one billion, two hundred twenty-nine million, seven hundred five thousand, six hundred sixty-four".