42040518 has 32 divisors (see below), whose sum is σ = 91152096. Its totient is φ = 12849408.

The previous prime is 42040469. The next prime is 42040601. The reversal of 42040518 is 81504024.

It is a super-3 number, since 3×42040518³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10530 + ... + 13962.

It is an arithmetic number, because the mean of its divisors is an integer number (2848503).

Almost surely, 2^42040518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42040518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45576048).

42040518 is an abundant number, since it is smaller than the sum of its proper divisors (49111578).

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

42040518 is a wasteful number, since it uses less digits than its factorization.

42040518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3608.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 42040518 is about 6483.8659764064. The cubic root of 42040518 is about 347.7144076483.

The spelling of 42040518 in words is "forty-two million, forty thousand, five hundred eighteen".