422991442 has 4 divisors (see below), whose sum is σ = 634487166. Its totient is φ = 211495720.

The previous prime is 422991427. The next prime is 422991449. The reversal of 422991442 is 244199224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 418243401 + 4748041 = 20451^2 + 2179^2 .

It is not an unprimeable number, because it can be changed into a prime (422991449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105747859 + ... + 105747862.

Almost surely, 2^422991442 is an apocalyptic number.

422991442 is a deficient number, since it is larger than the sum of its proper divisors (211495724).

422991442 is a wasteful number, since it uses less digits than its factorization.

422991442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211495723.

The product of its digits is 41472, while the sum is 37.

The square root of 422991442 is about 20566.7557480513. The cubic root of 422991442 is about 750.6610125047.

The spelling of 422991442 in words is "four hundred twenty-two million, nine hundred ninety-one thousand, four hundred forty-two".