422021636 has 6 divisors (see below), whose sum is σ = 738537870. Its totient is φ = 211010816.

The previous prime is 422021557. The next prime is 422021647. The reversal of 422021636 is 636120224.

It can be written as a sum of positive squares in only one way, i.e., 405780736 + 16240900 = 20144^2 + 4030^2 .

It is a super-2 number, since 2×422021636² = 356204522504232992, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52752701 + ... + 52752708.

It is an arithmetic number, because the mean of its divisors is an integer number (123089645).

Almost surely, 2^422021636 is an apocalyptic number.

It is an amenable number.

422021636 is a deficient number, since it is larger than the sum of its proper divisors (316516234).

422021636 is a wasteful number, since it uses less digits than its factorization.

422021636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105505413 (or 105505411 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 422021636 is about 20543.1651894249. The cubic root of 422021636 is about 750.0868853416.

The spelling of 422021636 in words is "four hundred twenty-two million, twenty-one thousand, six hundred thirty-six".