1240678564 has 12 divisors (see below), whose sum is σ = 2298904524. Its totient is φ = 583848704.

The previous prime is 1240678541. The next prime is 1240678577. The reversal of 1240678564 is 4658760421.

It can be written as a sum of positive squares in 2 ways, for example, as 355020964 + 885657600 = 18842^2 + 29760^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1240678564.

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, 9122569 + ... + 9122704.

It is an arithmetic number, because the mean of its divisors is an integer number (191575377).

Almost surely, 2^1240678564 is an apocalyptic number.

It is an amenable number.

1240678564 is a deficient number, since it is larger than the sum of its proper divisors (1058225960).

1240678564 is a wasteful number, since it uses less digits than its factorization.

1240678564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18245294 (or 18245292 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 1240678564 is about 35223.2673668983. The cubic root of 1240678564 is about 1074.5330047317.

The spelling of 1240678564 in words is "one billion, two hundred forty million, six hundred seventy-eight thousand, five hundred sixty-four".