42779858 has 8 divisors (see below), whose sum is σ = 70003440. Its totient is φ = 19445380.

The previous prime is 42779857. The next prime is 42779861. The reversal of 42779858 is 85897724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42779857) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 972248 + ... + 972291.

It is an arithmetic number, because the mean of its divisors is an integer number (8750430).

Almost surely, 2^42779858 is an apocalyptic number.

42779858 is a deficient number, since it is larger than the sum of its proper divisors (27223582).

42779858 is a wasteful number, since it uses less digits than its factorization.

42779858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944552.

The product of its digits is 1128960, while the sum is 50.

The square root of 42779858 is about 6540.6313150949. The cubic root of 42779858 is about 349.7409184707.

The spelling of 42779858 in words is "forty-two million, seven hundred seventy-nine thousand, eight hundred fifty-eight".