2439048781 has 4 divisors (see below), whose sum is σ = 2626667932. Its totient is φ = 2251429632.

The previous prime is 2439048763. The next prime is 2439048793. The reversal of 2439048781 is 1878409342.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1386370756 + 1052678025 = 37234^2 + 32445^2 .

It is a cyclic number.

It is not a de Polignac number, because 2439048781 - 2¹¹ = 2439046733 is a prime.

It is a super-2 number, since 2×2439048781² = 11897917912195171922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2439048281) 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, 93809556 + ... + 93809581.

It is an arithmetic number, because the mean of its divisors is an integer number (656666983).

Almost surely, 2^2439048781 is an apocalyptic number.

It is an amenable number.

2439048781 is a deficient number, since it is larger than the sum of its proper divisors (187619151).

2439048781 is a wasteful number, since it uses less digits than its factorization.

2439048781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187619150.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 2439048781 is about 49386.7267694469. The cubic root of 2439048781 is about 1346.0881325835.

The spelling of 2439048781 in words is "two billion, four hundred thirty-nine million, forty-eight thousand, seven hundred eighty-one".