442132989 has 8 divisors (see below), whose sum is σ = 590590560. Its totient is φ = 294215376.

The previous prime is 442132969. The next prime is 442132997. The reversal of 442132989 is 989231244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 442132989 - 2⁷ = 442132861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442132989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442132909) 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, 133074 + ... + 136355.

It is an arithmetic number, because the mean of its divisors is an integer number (73823820).

Almost surely, 2^442132989 is an apocalyptic number.

It is an amenable number.

442132989 is a deficient number, since it is larger than the sum of its proper divisors (148457571).

442132989 is a wasteful number, since it uses less digits than its factorization.

442132989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269979.

The product of its digits is 124416, while the sum is 42.

The square root of 442132989 is about 21026.9586245848. The cubic root of 442132989 is about 761.8175502315.

The spelling of 442132989 in words is "four hundred forty-two million, one hundred thirty-two thousand, nine hundred eighty-nine".