42022008 has 144 divisors (see below), whose sum is σ = 135958680. Its totient is φ = 11684736.

The previous prime is 42021997. The next prime is 42022031. The reversal of 42022008 is 80022024.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 151566 + ... + 151842.

Almost surely, 2^42022008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42022008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67979340).

42022008 is an abundant number, since it is smaller than the sum of its proper divisors (93936672).

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

42022008 is a wasteful number, since it uses less digits than its factorization.

42022008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 332 counting only the distinct ones).

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

The square root of 42022008 is about 6482.4384300971. The cubic root of 42022008 is about 347.6633684856.

The spelling of 42022008 in words is "forty-two million, twenty-two thousand, eight".