442443497428 has 24 divisors (see below), whose sum is σ = 829033266600. Its totient is φ = 205869278208.

The previous prime is 442443497383. The next prime is 442443497449. The reversal of 442443497428 is 824794344244.

It can be written as a sum of positive squares in 4 ways, for example, as 209716370704 + 232727126724 = 457948^2 + 482418^2 .

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, 36547443 + ... + 36559546.

It is an arithmetic number, because the mean of its divisors is an integer number (34543052775).

Almost surely, 2^442443497428 is an apocalyptic number.

It is an amenable number.

442443497428 is a deficient number, since it is larger than the sum of its proper divisors (386589769172).

442443497428 is a wasteful number, since it uses less digits than its factorization.

442443497428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73107099 (or 73107097 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 55.

The spelling of 442443497428 in words is "four hundred forty-two billion, four hundred forty-three million, four hundred ninety-seven thousand, four hundred twenty-eight".