442831401 has 8 divisors (see below), whose sum is σ = 656046560. Its totient is φ = 295220916.

The previous prime is 442831339. The next prime is 442831409. The reversal of 442831401 is 104138244.

442831401 is a `hidden beast` number, since 442 + 83 + 140 + 1 = 666.

It is not a de Polignac number, because 442831401 - 2⁷ = 442831273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 16401163 = 442831401 / (4 + 4 + 2 + 8 + 3 + 1 + 4 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (442831409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8200555 + ... + 8200608.

It is an arithmetic number, because the mean of its divisors is an integer number (82005820).

Almost surely, 2^442831401 is an apocalyptic number.

It is an amenable number.

442831401 is a deficient number, since it is larger than the sum of its proper divisors (213215159).

442831401 is a wasteful number, since it uses less digits than its factorization.

442831401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16401172 (or 16401166 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 442831401 is about 21043.5596085833. The cubic root of 442831401 is about 762.2184722931.

Adding to 442831401 its reverse (104138244), we get a palindrome (546969645).

The spelling of 442831401 in words is "four hundred forty-two million, eight hundred thirty-one thousand, four hundred one".