422121678 has 32 divisors (see below), whose sum is σ = 945889920. Its totient is φ = 124457760.

The previous prime is 422121659. The next prime is 422121703. The reversal of 422121678 is 876121224.

It is a super-2 number, since 2×422121678² = 356373422075071368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83988 + ... + 88871.

It is an arithmetic number, because the mean of its divisors is an integer number (29559060).

Almost surely, 2^422121678 is an apocalyptic number.

422121678 is an abundant number, since it is smaller than the sum of its proper divisors (523768242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

422121678 is a wasteful number, since it uses less digits than its factorization.

422121678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172912.

The product of its digits is 10752, while the sum is 33.

The square root of 422121678 is about 20545.5999669029. The cubic root of 422121678 is about 750.1461510735.

The spelling of 422121678 in words is "four hundred twenty-two million, one hundred twenty-one thousand, six hundred seventy-eight".