442046309 has 4 divisors (see below), whose sum is σ = 444973920. Its totient is φ = 439118700.

The previous prime is 442046299. The next prime is 442046347. The reversal of 442046309 is 903640244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 442046309 - 2¹² = 442042213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442042309) 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, 1463579 + ... + 1463880.

It is an arithmetic number, because the mean of its divisors is an integer number (111243480).

Almost surely, 2^442046309 is an apocalyptic number.

It is an amenable number.

442046309 is a deficient number, since it is larger than the sum of its proper divisors (2927611).

442046309 is a wasteful number, since it uses less digits than its factorization.

442046309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2927610.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 442046309 is about 21024.8973600348. The cubic root of 442046309 is about 761.7677622999.

The spelling of 442046309 in words is "four hundred forty-two million, forty-six thousand, three hundred nine".