442540987 has 8 divisors (see below), whose sum is σ = 505957856. Its totient is φ = 379173312.

The previous prime is 442540961. The next prime is 442541009. The reversal of 442540987 is 789045244.

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

It is not a de Polignac number, because 442540987 - 2¹¹ = 442538939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442540927) 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, 9583 + ... + 31255.

It is an arithmetic number, because the mean of its divisors is an integer number (63244732).

Almost surely, 2^442540987 is an apocalyptic number.

442540987 is a deficient number, since it is larger than the sum of its proper divisors (63416869).

442540987 is a wasteful number, since it uses less digits than its factorization.

442540987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24597.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 442540987 is about 21036.6581709168. The cubic root of 442540987 is about 762.0518119325.

It can be divided in two parts, 4425409 and 87, that multiplied together give a palindrome (385010583).

The spelling of 442540987 in words is "four hundred forty-two million, five hundred forty thousand, nine hundred eighty-seven".