422778670389 has 24 divisors (see below), whose sum is σ = 637642380960. Its totient is φ = 269590076448.

The previous prime is 422778670319. The next prime is 422778670393. The reversal of 422778670389 is 983076877224.

422778670389 is a `hidden beast` number, since 42 + 2 + 77 + 86 + 70 + 389 = 666.

It is not a de Polignac number, because 422778670389 - 2⁷ = 422778670261 is a prime.

It is a super-2 number, since 2×422778670389² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422778670319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7541427 + ... + 7597280.

It is an arithmetic number, because the mean of its divisors is an integer number (26568432540).

Almost surely, 2^422778670389 is an apocalyptic number.

It is an amenable number.

422778670389 is a deficient number, since it is larger than the sum of its proper divisors (214863710571).

422778670389 is a wasteful number, since it uses less digits than its factorization.

422778670389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15138849 (or 15138846 counting only the distinct ones).

The product of its (nonzero) digits is 56899584, while the sum is 63.

The spelling of 422778670389 in words is "four hundred twenty-two billion, seven hundred seventy-eight million, six hundred seventy thousand, three hundred eighty-nine".