2443788981 has 16 divisors (see below), whose sum is σ = 3833395200. Its totient is φ = 1533357504.

The previous prime is 2443788979. The next prime is 2443789001. The reversal of 2443788981 is 1898873442.

It is a happy number.

It is not a de Polignac number, because 2443788981 - 2¹ = 2443788979 is a prime.

It is a super-2 number, since 2×2443788981² = 11944209167314036722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2443788901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2661621 + ... + 2662538.

It is an arithmetic number, because the mean of its divisors is an integer number (239587200).

Almost surely, 2^2443788981 is an apocalyptic number.

It is an amenable number.

2443788981 is a deficient number, since it is larger than the sum of its proper divisors (1389606219).

2443788981 is a wasteful number, since it uses less digits than its factorization.

2443788981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5324185 (or 5324179 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 2443788981 is about 49434.6941024216. The cubic root of 2443788981 is about 1346.9595922422.

The spelling of 2443788981 in words is "two billion, four hundred forty-three million, seven hundred eighty-eight thousand, nine hundred eighty-one".