42394624 has 44 divisors (see below), whose sum is σ = 89249200. Its totient is φ = 20072448.

The previous prime is 42394621. The next prime is 42394631. The reversal of 42394624 is 42649324.

It is a self number, because there is not a number n which added to its sum of digits gives 42394624.

It is not an unprimeable number, because it can be changed into a prime (42394621) 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, 18367 + ... + 20545.

Almost surely, 2^42394624 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 42394624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44624600).

42394624 is an abundant number, since it is smaller than the sum of its proper divisors (46854576).

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

42394624 is a wasteful number, since it uses less digits than its factorization.

42394624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218 (or 2200 counting only the distinct ones).

The product of its digits is 41472, while the sum is 34.

The square root of 42394624 is about 6511.1154190354. The cubic root of 42394624 is about 348.6879420074.

The spelling of 42394624 in words is "forty-two million, three hundred ninety-four thousand, six hundred twenty-four".