442322428 has 6 divisors (see below), whose sum is σ = 774064256. Its totient is φ = 221161212.

The previous prime is 442322401. The next prime is 442322429. The reversal of 442322428 is 824223244.

It is a self number, because there is not a number n which added to its sum of digits gives 442322428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442322429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55290300 + ... + 55290307.

Almost surely, 2^442322428 is an apocalyptic number.

It is an amenable number.

442322428 is a deficient number, since it is larger than the sum of its proper divisors (331741828).

442322428 is a wasteful number, since it uses less digits than its factorization.

442322428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110580611 (or 110580609 counting only the distinct ones).

The product of its digits is 24576, while the sum is 31.

The square root of 442322428 is about 21031.4628117019. The cubic root of 442322428 is about 761.9263390286.

The spelling of 442322428 in words is "four hundred forty-two million, three hundred twenty-two thousand, four hundred twenty-eight".