4238445981 has 48 divisors (see below), whose sum is σ = 7164578304. Its totient is φ = 2165256000.

The previous prime is 4238445979. The next prime is 4238445997. The reversal of 4238445981 is 1895448324.

It is not a de Polignac number, because 4238445981 - 2¹ = 4238445979 is a prime.

It is a super-2 number, since 2×4238445981² = 35928848667710104722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4238445981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4238445901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 857086 + ... + 862016.

It is an arithmetic number, because the mean of its divisors is an integer number (149262048).

Almost surely, 2^4238445981 is an apocalyptic number.

It is an amenable number.

4238445981 is a deficient number, since it is larger than the sum of its proper divisors (2926132323).

4238445981 is a wasteful number, since it uses less digits than its factorization.

4238445981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5074 (or 5013 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 48.

The square root of 4238445981 is about 65103.3484622719. The cubic root of 4238445981 is about 1618.3367042823.

The spelling of 4238445981 in words is "four billion, two hundred thirty-eight million, four hundred forty-five thousand, nine hundred eighty-one".