42844620 has 288 divisors, whose sum is σ = 160876800. Its totient is φ = 8418816.

The previous prime is 42844603. The next prime is 42844643. The reversal of 42844620 is 2644824.

It is a super-2 number, since 2×42844620² = 3671322925888800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 726151 + ... + 726209.

It is an arithmetic number, because the mean of its divisors is an integer number (558600).

Almost surely, 2^42844620 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 42844620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80438400).

42844620 is an abundant number, since it is smaller than the sum of its proper divisors (118032180).

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

42844620 is a wasteful number, since it uses less digits than its factorization.

42844620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 42844620 is about 6545.5801881881. The cubic root of 42844620 is about 349.9173138006.

The spelling of 42844620 in words is "forty-two million, eight hundred forty-four thousand, six hundred twenty".