1224636642 has 24 divisors (see below), whose sum is σ = 2654031744. Its totient is φ = 408111864.

The previous prime is 1224636641. The next prime is 1224636649. The reversal of 1224636642 is 2466364221.

1224636642 is a `hidden beast` number, since 1 + 2 + 2 + 4 + 6 + 3 + 6 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1224636597 and 1224636606.

It is not an unprimeable number, because it can be changed into a prime (1224636641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120823 + ... + 130565.

It is an arithmetic number, because the mean of its divisors is an integer number (110584656).

Almost surely, 2^1224636642 is an apocalyptic number.

1224636642 is an abundant number, since it is smaller than the sum of its proper divisors (1429395102).

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

1224636642 is a wasteful number, since it uses less digits than its factorization.

1224636642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16734 (or 16731 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 1224636642 is about 34994.8087864472. The cubic root of 1224636642 is about 1069.8816773112.

The spelling of 1224636642 in words is "one billion, two hundred twenty-four million, six hundred thirty-six thousand, six hundred forty-two".