422239978 has 8 divisors (see below), whose sum is σ = 633541860. Its totient is φ = 211059360.

The previous prime is 422239969. The next prime is 422239997. The reversal of 422239978 is 879932224.

It can be written as a sum of positive squares in 2 ways, for example, as 415874449 + 6365529 = 20393^2 + 2523^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×422239978⁴ (a number of 36 digits) contains 4444 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21043 + ... + 35878.

Almost surely, 2^422239978 is an apocalyptic number.

422239978 is a deficient number, since it is larger than the sum of its proper divisors (211301882).

422239978 is a wasteful number, since it uses less digits than its factorization.

422239978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60632.

The product of its digits is 435456, while the sum is 46.

The square root of 422239978 is about 20548.4787271467. The cubic root of 422239978 is about 750.2162209180.

The spelling of 422239978 in words is "four hundred twenty-two million, two hundred thirty-nine thousand, nine hundred seventy-eight".