442551420 has 72 divisors (see below), whose sum is σ = 1413069840. Its totient is φ = 111801600.

The previous prime is 442551409. The next prime is 442551427. The reversal of 442551420 is 24155244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442551427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61281 + ... + 68120.

It is an arithmetic number, because the mean of its divisors is an integer number (19625970).

Almost surely, 2^442551420 is an apocalyptic number.

It is an amenable number.

442551420 is an abundant number, since it is smaller than the sum of its proper divisors (970518420).

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

442551420 is a wasteful number, since it uses less digits than its factorization.

442551420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129435 (or 129430 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 442551420 is about 21036.9061413507. The cubic root of 442551420 is about 762.0578003978.

The spelling of 442551420 in words is "four hundred forty-two million, five hundred fifty-one thousand, four hundred twenty".