42401984 has 14 divisors (see below), whose sum is σ = 84141564. Its totient is φ = 21200960.

The previous prime is 42401971. The next prime is 42401987. The reversal of 42401984 is 48910424.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 42401984.

It is not an unprimeable number, because it can be changed into a prime (42401987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331202 + ... + 331329.

Almost surely, 2^42401984 is an apocalyptic number.

It is an amenable number.

42401984 is a deficient number, since it is larger than the sum of its proper divisors (41739580).

42401984 is an equidigital number, since it uses as much as digits as its factorization.

42401984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662543 (or 662533 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 42401984 is about 6511.6805818467. The cubic root of 42401984 is about 348.7081190528.

The spelling of 42401984 in words is "forty-two million, four hundred one thousand, nine hundred eighty-four".