42427778 has 16 divisors (see below), whose sum is σ = 68553216. Its totient is φ = 19636320.

The previous prime is 42427751. The next prime is 42427811. The reversal of 42427778 is 87772424.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13451 + ... + 16302.

It is an arithmetic number, because the mean of its divisors is an integer number (4284576).

Almost surely, 2^42427778 is an apocalyptic number.

42427778 is a deficient number, since it is larger than the sum of its proper divisors (26125438).

42427778 is a wasteful number, since it uses less digits than its factorization.

42427778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29809.

The product of its digits is 175616, while the sum is 41.

The square root of 42427778 is about 6513.6608754217. The cubic root of 42427778 is about 348.7788134962.

The spelling of 42427778 in words is "forty-two million, four hundred twenty-seven thousand, seven hundred seventy-eight".