442644620 has 72 divisors (see below), whose sum is σ = 1032426864. Its totient is φ = 159280000.

The previous prime is 442644563. The next prime is 442644647. The reversal of 442644620 is 26446244.

It is a super-2 number, since 2×442644620² = 391868519229888800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 243515 + ... + 245325.

It is an arithmetic number, because the mean of its divisors is an integer number (14339262).

Almost surely, 2^442644620 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 442644620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (516213432).

442644620 is an abundant number, since it is smaller than the sum of its proper divisors (589782244).

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

442644620 is a wasteful number, since it uses less digits than its factorization.

442644620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943 (or 1930 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

The square root of 442644620 is about 21039.1211793649. The cubic root of 442644620 is about 762.1112923376. Note that the first 3 decimals are identical.

It can be divided in two parts, 44264 and 4620, that added together give a palindrome (48884).

The spelling of 442644620 in words is "four hundred forty-two million, six hundred forty-four thousand, six hundred twenty".