442320628 has 24 divisors (see below), whose sum is σ = 804129984. Its totient is φ = 212721600.

The previous prime is 442320611. The next prime is 442320631. The reversal of 442320628 is 826023244.

It is a self number, because there is not a number n which added to its sum of digits gives 442320628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7350 + ... + 30637.

It is an arithmetic number, because the mean of its divisors is an integer number (33505416).

Almost surely, 2^442320628 is an apocalyptic number.

It is an amenable number.

442320628 is a deficient number, since it is larger than the sum of its proper divisors (361809356).

442320628 is a wasteful number, since it uses less digits than its factorization.

442320628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38103 (or 38101 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 442320628 is about 21031.4200186293. The cubic root of 442320628 is about 761.9253054920.

The spelling of 442320628 in words is "four hundred forty-two million, three hundred twenty thousand, six hundred twenty-eight".