42244390987 has 4 divisors (see below), whose sum is σ = 42257145400. Its totient is φ = 42231636576.

The previous prime is 42244390961. The next prime is 42244390999. The reversal of 42244390987 is 78909344224.

42244390987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42244390987 - 2³⁵ = 7884652619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42244390087) 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, 6372237 + ... + 6378862.

It is an arithmetic number, because the mean of its divisors is an integer number (10564286350).

Almost surely, 2^42244390987 is an apocalyptic number.

42244390987 is a deficient number, since it is larger than the sum of its proper divisors (12754413).

42244390987 is a wasteful number, since it uses less digits than its factorization.

42244390987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12754412.

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 42244390987 in words is "forty-two billion, two hundred forty-four million, three hundred ninety thousand, nine hundred eighty-seven".