42644022 has 8 divisors (see below), whose sum is σ = 85288056. Its totient is φ = 14214672.

The previous prime is 42643969. The next prime is 42644023. The reversal of 42644022 is 22044624.

It is a sphenic number, since it is the product of 3 distinct primes.

42644022 is an admirable number.

It is a super-2 number, since 2×42644022² = 3637025224672968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42643983 and 42644001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42644023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3553663 + ... + 3553674.

It is an arithmetic number, because the mean of its divisors is an integer number (10661007).

Almost surely, 2^42644022 is an apocalyptic number.

42644022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

42644022 is a wasteful number, since it uses less digits than its factorization.

42644022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7107342.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 42644022 is about 6530.2390461606. The cubic root of 42644022 is about 349.3703563973.

Adding to 42644022 its reverse (22044624), we get a palindrome (64688646).

The spelling of 42644022 in words is "forty-two million, six hundred forty-four thousand, twenty-two".