2439332781 has 16 divisors (see below), whose sum is σ = 3485583744. Its totient is φ = 1513473984.

The previous prime is 2439332711. The next prime is 2439332783. The reversal of 2439332781 is 1872339342.

It is not a de Polignac number, because 2439332781 - 2¹⁸ = 2439070637 is a prime.

It is a super-2 number, since 2×2439332781² = 11900688832922387922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2439332783) 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, 475186 + ... + 480291.

It is an arithmetic number, because the mean of its divisors is an integer number (217848984).

Almost surely, 2^2439332781 is an apocalyptic number.

It is an amenable number.

2439332781 is a deficient number, since it is larger than the sum of its proper divisors (1046250963).

2439332781 is a wasteful number, since it uses less digits than its factorization.

2439332781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955540.

The product of its digits is 217728, while the sum is 42.

The square root of 2439332781 is about 49389.6019522328. The cubic root of 2439332781 is about 1346.1403762007.

The spelling of 2439332781 in words is "two billion, four hundred thirty-nine million, three hundred thirty-two thousand, seven hundred eighty-one".