442034989 has 4 divisors (see below), whose sum is σ = 482220000. Its totient is φ = 401849980.

The previous prime is 442034987. The next prime is 442034993. The reversal of 442034989 is 989430244.

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 442034989 - 2¹ = 442034987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442034987) 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, 20092489 + ... + 20092510.

It is an arithmetic number, because the mean of its divisors is an integer number (120555000).

Almost surely, 2^442034989 is an apocalyptic number.

It is an amenable number.

442034989 is a deficient number, since it is larger than the sum of its proper divisors (40185011).

442034989 is a wasteful number, since it uses less digits than its factorization.

442034989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40185010.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 442034989 is about 21024.6281536678. The cubic root of 442034989 is about 761.7612597499.

The spelling of 442034989 in words is "four hundred forty-two million, thirty-four thousand, nine hundred eighty-nine".