42442290 has 96 divisors (see below), whose sum is σ = 123304896. Its totient is φ = 10039680.

The previous prime is 42442259. The next prime is 42442307. The reversal of 42442290 is 9224424.

42442290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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 47 ways as a sum of consecutive naturals, for example, 42072 + ... + 43068.

It is an arithmetic number, because the mean of its divisors is an integer number (1284426).

Almost surely, 2^42442290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42442290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61652448).

42442290 is an abundant number, since it is smaller than the sum of its proper divisors (80862606).

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

42442290 is a wasteful number, since it uses less digits than its factorization.

42442290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 42442290 is about 6514.7747466816. The cubic root of 42442290 is about 348.8185744061.

The spelling of 42442290 in words is "forty-two million, four hundred forty-two thousand, two hundred ninety".