442894243 has 16 divisors (see below), whose sum is σ = 489356640. Its totient is φ = 400810080.

The previous prime is 442894229. The next prime is 442894253. The reversal of 442894243 is 342498244.

It is a happy number.

It is not a de Polignac number, because 442894243 - 2⁵ = 442894211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442894196 and 442894205.

It is not an unprimeable number, because it can be changed into a prime (442894223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 357421 + ... + 358657.

It is an arithmetic number, because the mean of its divisors is an integer number (30584790).

Almost surely, 2^442894243 is an apocalyptic number.

442894243 is a deficient number, since it is larger than the sum of its proper divisors (46462397).

442894243 is a wasteful number, since it uses less digits than its factorization.

442894243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539 (or 1517 counting only the distinct ones).

The product of its digits is 221184, while the sum is 40.

The square root of 442894243 is about 21045.0526965365. The cubic root of 442894243 is about 762.2545259451.

The spelling of 442894243 in words is "four hundred forty-two million, eight hundred ninety-four thousand, two hundred forty-three".