42013998 has 64 divisors (see below), whose sum is σ = 101747520. Its totient is φ = 12773376.

The previous prime is 42013991. The next prime is 42013999. The reversal of 42013998 is 89931024.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42013991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67786 + ... + 68402.

It is an arithmetic number, because the mean of its divisors is an integer number (1589805).

Almost surely, 2^42013998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42013998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50873760).

42013998 is an abundant number, since it is smaller than the sum of its proper divisors (59733522).

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

42013998 is a wasteful number, since it uses less digits than its factorization.

42013998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 42013998 is about 6481.8205775847. The cubic root of 42013998 is about 347.6412772000.

The spelling of 42013998 in words is "forty-two million, thirteen thousand, nine hundred ninety-eight".