2257639387 has 16 divisors (see below), whose sum is σ = 2360936448. Its totient is φ = 2156394240.

The previous prime is 2257639369. The next prime is 2257639399. The reversal of 2257639387 is 7839367522.

It is a cyclic number.

It is not a de Polignac number, because 2257639387 - 2¹⁹ = 2257115099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2257639187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1126128 + ... + 1128130.

It is an arithmetic number, because the mean of its divisors is an integer number (147558528).

Almost surely, 2^2257639387 is an apocalyptic number.

2257639387 is a deficient number, since it is larger than the sum of its proper divisors (103297061).

2257639387 is a wasteful number, since it uses less digits than its factorization.

2257639387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490.

The product of its digits is 3810240, while the sum is 52.

The square root of 2257639387 is about 47514.6228754896. The cubic root of 2257639387 is about 1311.8520483307.

The spelling of 2257639387 in words is "two billion, two hundred fifty-seven million, six hundred thirty-nine thousand, three hundred eighty-seven".