42228678 has 16 divisors (see below), whose sum is σ = 88902720. Its totient is φ = 13335336.

The previous prime is 42228587. The next prime is 42228679. The reversal of 42228678 is 87682224.

It is a super-2 number, since 2×42228678² = 3566522491255368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42228679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185100 + ... + 185327.

It is an arithmetic number, because the mean of its divisors is an integer number (5556420).

Almost surely, 2^42228678 is an apocalyptic number.

42228678 is an abundant number, since it is smaller than the sum of its proper divisors (46674042).

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

42228678 is a wasteful number, since it uses less digits than its factorization.

42228678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370451.

The product of its digits is 86016, while the sum is 39.

The square root of 42228678 is about 6498.3596391705. The cubic root of 42228678 is about 348.2323887093.

The spelling of 42228678 in words is "forty-two million, two hundred twenty-eight thousand, six hundred seventy-eight".