42419978 has 8 divisors (see below), whose sum is σ = 64579872. Its totient is φ = 20893356.

The previous prime is 42419963. The next prime is 42419983. The reversal of 42419978 is 87991424.

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

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 3 ways as a sum of consecutive naturals, for example, 158150 + ... + 158417.

It is an arithmetic number, because the mean of its divisors is an integer number (8072484).

Almost surely, 2^42419978 is an apocalyptic number.

42419978 is a deficient number, since it is larger than the sum of its proper divisors (22159894).

42419978 is a wasteful number, since it uses less digits than its factorization.

42419978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316636.

The product of its digits is 145152, while the sum is 44.

The square root of 42419978 is about 6513.0621062600. The cubic root of 42419978 is about 348.7574388088.

It can be divided in two parts, 424 and 19978, that added together give a palindrome (20402).

The spelling of 42419978 in words is "forty-two million, four hundred nineteen thousand, nine hundred seventy-eight".