442790430625 has 45 divisors (see below), whose sum is σ = 567394495173. Its totient is φ = 345435426000.

The previous prime is 442790430611. The next prime is 442790430629. The reversal of 442790430625 is 526034097244.

The square root of 442790430625 is 665425.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 34714769761 + 408075660864 = 186319^2 + 638808^2 .

It is a de Polignac number, because none of the positive numbers 2^k-442790430625 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442790430629) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 715331566 + ... + 715332184.

Almost surely, 2^442790430625 is an apocalyptic number.

442790430625 is the 665425-th square number.

442790430625 is the 332713-rd centered octagonal number.

It is an amenable number.

442790430625 is a deficient number, since it is larger than the sum of its proper divisors (124604064548).

442790430625 is an frugal number, since it uses more digits than its factorization.

442790430625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 46.

The spelling of 442790430625 in words is "four hundred forty-two billion, seven hundred ninety million, four hundred thirty thousand, six hundred twenty-five".