442555740 has 144 divisors (see below), whose sum is σ = 1479625056. Its totient is φ = 106176000.

The previous prime is 442555739. The next prime is 442555759. The reversal of 442555740 is 47555244.

It is a happy number.

442555740 is a `hidden beast` number, since 44 + 25 + 557 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 442555695 and 442555704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 198874 + ... + 201086.

It is an arithmetic number, because the mean of its divisors is an integer number (10275174).

Almost surely, 2^442555740 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 442555740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739812528).

442555740 is an abundant number, since it is smaller than the sum of its proper divisors (1037069316).

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

442555740 is a wasteful number, since it uses less digits than its factorization.

442555740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340 (or 2335 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 36.

The square root of 442555740 is about 21037.0088177954. The cubic root of 442555740 is about 762.0602800185.

The spelling of 442555740 in words is "four hundred forty-two million, five hundred fifty-five thousand, seven hundred forty".