442424791 has 4 divisors (see below), whose sum is σ = 442641312. Its totient is φ = 442208272.

The previous prime is 442424789. The next prime is 442424797. The reversal of 442424791 is 197424244.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 442424791 - 2¹ = 442424789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442424791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442424797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105166 + ... + 109291.

It is an arithmetic number, because the mean of its divisors is an integer number (110660328).

Almost surely, 2^442424791 is an apocalyptic number.

442424791 is a deficient number, since it is larger than the sum of its proper divisors (216521).

442424791 is a wasteful number, since it uses less digits than its factorization.

442424791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216520.

The product of its digits is 64512, while the sum is 37.

The square root of 442424791 is about 21033.8962391660. The cubic root of 442424791 is about 761.9851099200.

The spelling of 442424791 in words is "four hundred forty-two million, four hundred twenty-four thousand, seven hundred ninety-one".