42426978 has 16 divisors (see below), whose sum is σ = 92568096. Its totient is φ = 12856640.

The previous prime is 42426929. The next prime is 42426991. The reversal of 42426978 is 87962424.

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, 321351 + ... + 321482.

It is an arithmetic number, because the mean of its divisors is an integer number (5785506).

Almost surely, 2^42426978 is an apocalyptic number.

42426978 is an abundant number, since it is smaller than the sum of its proper divisors (50141118).

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

42426978 is a wasteful number, since it uses less digits than its factorization.

42426978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642849.

The product of its digits is 193536, while the sum is 42.

The square root of 42426978 is about 6513.5994657332. The cubic root of 42426978 is about 348.7766213411.

The spelling of 42426978 in words is "forty-two million, four hundred twenty-six thousand, nine hundred seventy-eight".