42228086 has 4 divisors (see below), whose sum is σ = 63342132. Its totient is φ = 21114042.

The previous prime is 42228083. The next prime is 42228103. The reversal of 42228086 is 68082224.

It is a happy number.

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

It is a super-2 number, since 2×42228086² = 3566422494446792, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42228083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10557020 + ... + 10557023.

It is an arithmetic number, because the mean of its divisors is an integer number (15835533).

Almost surely, 2^42228086 is an apocalyptic number.

42228086 is a deficient number, since it is larger than the sum of its proper divisors (21114046).

42228086 is a wasteful number, since it uses less digits than its factorization.

42228086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21114045.

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 42228086 is about 6498.3140890542. The cubic root of 42228086 is about 348.2307614223.

The spelling of 42228086 in words is "forty-two million, two hundred twenty-eight thousand, eighty-six".