2587239945 has 24 divisors (see below), whose sum is σ = 4748347656. Its totient is φ = 1298692608.

The previous prime is 2587239887. The next prime is 2587239947. The reversal of 2587239945 is 5499327852.

It can be written as a sum of positive squares in 4 ways, for example, as 372219849 + 2215020096 = 19293^2 + 47064^2 .

It is not a de Polignac number, because 2587239945 - 2¹³ = 2587231753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2587239891 and 2587239900.

It is not an unprimeable number, because it can be changed into a prime (2587239947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1690242 + ... + 1691771.

It is an arithmetic number, because the mean of its divisors is an integer number (197847819).

Almost surely, 2^2587239945 is an apocalyptic number.

It is an amenable number.

2587239945 is a deficient number, since it is larger than the sum of its proper divisors (2161107711).

2587239945 is a wasteful number, since it uses less digits than its factorization.

2587239945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382041 (or 3382038 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The square root of 2587239945 is about 50864.9186080151. The cubic root of 2587239945 is about 1372.8156957414.

The spelling of 2587239945 in words is "two billion, five hundred eighty-seven million, two hundred thirty-nine thousand, nine hundred forty-five".