442615989 has 8 divisors (see below), whose sum is σ = 590270752. Its totient is φ = 295019280.

The previous prime is 442615981. The next prime is 442615991. The reversal of 442615989 is 989516244.

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

It is not a de Polignac number, because 442615989 - 2³ = 442615981 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 (442615981) 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, 8487 + ... + 30939.

It is an arithmetic number, because the mean of its divisors is an integer number (73783844).

Almost surely, 2^442615989 is an apocalyptic number.

It is an amenable number.

442615989 is a deficient number, since it is larger than the sum of its proper divisors (147654763).

442615989 is a wasteful number, since it uses less digits than its factorization.

442615989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29027.

The product of its digits is 622080, while the sum is 48.

The square root of 442615989 is about 21038.4407454545. The cubic root of 442615989 is about 762.0948604358.

The spelling of 442615989 in words is "four hundred forty-two million, six hundred fifteen thousand, nine hundred eighty-nine".