4438311987 has 4 divisors (see below), whose sum is σ = 5917749320. Its totient is φ = 2958874656.

The previous prime is 4438311967. The next prime is 4438312003. The reversal of 4438311987 is 7891138344.

It is a happy number.

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

It is not a de Polignac number, because 4438311987 - 2¹⁹ = 4437787699 is a prime.

It is a super-2 number, since 2×4438311987² = 39397226587895776338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4438311947) 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, 739718662 + ... + 739718667.

It is an arithmetic number, because the mean of its divisors is an integer number (1479437330).

Almost surely, 2^4438311987 is an apocalyptic number.

4438311987 is a deficient number, since it is larger than the sum of its proper divisors (1479437333).

4438311987 is a wasteful number, since it uses less digits than its factorization.

4438311987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479437332.

The product of its digits is 580608, while the sum is 48.

The square root of 4438311987 is about 66620.6573594107. The cubic root of 4438311987 is about 1643.3848377894.

The spelling of 4438311987 in words is "four billion, four hundred thirty-eight million, three hundred eleven thousand, nine hundred eighty-seven".