42040220 has 24 divisors (see below), whose sum is σ = 88461744. Its totient is φ = 16782336.

The previous prime is 42040199. The next prime is 42040249. The reversal of 42040220 is 2204024.

It is a happy number.

42040220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 42040195 and 42040204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9719 + ... + 13361.

It is an arithmetic number, because the mean of its divisors is an integer number (3685906).

Almost surely, 2^42040220 is an apocalyptic number.

It is an amenable number.

42040220 is an abundant number, since it is smaller than the sum of its proper divisors (46421524).

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

42040220 is a wasteful number, since it uses less digits than its factorization.

42040220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4229 (or 4227 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 42040220 is about 6483.8429962484. The cubic root of 42040220 is about 347.7135860668.

Adding to 42040220 its reverse (2204024), we get a palindrome (44244244).

The spelling of 42040220 in words is "forty-two million, forty thousand, two hundred twenty".