42019998 has 16 divisors (see below), whose sum is σ = 86090256. Its totient is φ = 13664960.

The previous prime is 42019981. The next prime is 42020003. The reversal of 42019998 is 89991024.

It is a Curzon number.

It is a congruent 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, 85161 + ... + 85652.

It is an arithmetic number, because the mean of its divisors is an integer number (5380641).

Almost surely, 2^42019998 is an apocalyptic number.

42019998 is an abundant number, since it is smaller than the sum of its proper divisors (44070258).

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

42019998 is a wasteful number, since it uses less digits than its factorization.

42019998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170859.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 42019998 is about 6482.2833939901. The cubic root of 42019998 is about 347.6578252434.

The spelling of 42019998 in words is "forty-two million, nineteen thousand, nine hundred ninety-eight".