42008022 has 24 divisors (see below), whose sum is σ = 104020176. Its totient is φ = 12002256.

The previous prime is 42008009. The next prime is 42008023. The reversal of 42008022 is 22080024.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 42007986 and 42008004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42008023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166573 + ... + 166824.

It is an arithmetic number, because the mean of its divisors is an integer number (4334174).

Almost surely, 2^42008022 is an apocalyptic number.

42008022 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

42008022 is an abundant number, since it is smaller than the sum of its proper divisors (62012154).

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

42008022 is a wasteful number, since it uses less digits than its factorization.

42008022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333412 (or 333409 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 42008022 is about 6481.3595795944. The cubic root of 42008022 is about 347.6247937828.

Adding to 42008022 its reverse (22080024), we get a palindrome (64088046).

The spelling of 42008022 in words is "forty-two million, eight thousand, twenty-two".