1226643426 has 40 divisors (see below), whose sum is σ = 2751336720. Its totient is φ = 408472632.

The previous prime is 1226643409. The next prime is 1226643427. The reversal of 1226643426 is 6243466221.

1226643426 is a `hidden beast` number, since 1 + 2 + 2 + 6 + 643 + 4 + 2 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (1226643427) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 189105 + ... + 195483.

It is an arithmetic number, because the mean of its divisors is an integer number (68783418).

Almost surely, 2^1226643426 is an apocalyptic number.

1226643426 is an abundant number, since it is smaller than the sum of its proper divisors (1524693294).

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

1226643426 is a wasteful number, since it uses less digits than its factorization.

1226643426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7580 (or 7571 counting only the distinct ones).

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

The square root of 1226643426 is about 35023.4696453678. The cubic root of 1226643426 is about 1070.4657552509.

The spelling of 1226643426 in words is "one billion, two hundred twenty-six million, six hundred forty-three thousand, four hundred twenty-six".