422406644 has 36 divisors (see below), whose sum is σ = 820661604. Its totient is φ = 190080000.

The previous prime is 422406617. The next prime is 422406679. The reversal of 422406644 is 446604224.

It can be written as a sum of positive squares in 2 ways, for example, as 204490000 + 217916644 = 14300^2 + 14762^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 422406644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44564 + ... + 53204.

Almost surely, 2^422406644 is an apocalyptic number.

422406644 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

422406644 is a deficient number, since it is larger than the sum of its proper divisors (398254960).

422406644 is a wasteful number, since it uses less digits than its factorization.

422406644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8768 (or 8755 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

The square root of 422406644 is about 20552.5337610719. The cubic root of 422406644 is about 750.3149160483.

It can be divided in two parts, 42240 and 6644, that added together give a palindrome (48884).

The spelling of 422406644 in words is "four hundred twenty-two million, four hundred six thousand, six hundred forty-four".