42017982 has 16 divisors (see below), whose sum is σ = 88979472. Its totient is φ = 13182080.

The previous prime is 42017981. The next prime is 42018001. The reversal of 42017982 is 28971024.

It is a happy number.

It is a super-2 number, since 2×42017982² = 3531021622704648, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42017981) 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 7 ways as a sum of consecutive naturals, for example, 205869 + ... + 206072.

It is an arithmetic number, because the mean of its divisors is an integer number (5561217).

Almost surely, 2^42017982 is an apocalyptic number.

42017982 is an abundant number, since it is smaller than the sum of its proper divisors (46961490).

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

42017982 is a wasteful number, since it uses less digits than its factorization.

42017982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411963.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 42017982 is about 6482.1278913641. The cubic root of 42017982 is about 347.6522652766.

The spelling of 42017982 in words is "forty-two million, seventeen thousand, nine hundred eighty-two".