2566784238 has 16 divisors (see below), whose sum is σ = 5143064016. Its totient is φ = 854012160.

The previous prime is 2566784201. The next prime is 2566784243. The reversal of 2566784238 is 8324876652.

It is a super-3 number, since 3×2566784238³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 392131 + ... + 398622.

It is an arithmetic number, because the mean of its divisors is an integer number (321441501).

Almost surely, 2^2566784238 is an apocalyptic number.

2566784238 is an abundant number, since it is smaller than the sum of its proper divisors (2576279778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2566784238 is a wasteful number, since it uses less digits than its factorization.

2566784238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791299.

The product of its digits is 3870720, while the sum is 51.

The square root of 2566784238 is about 50663.4408424852. The cubic root of 2566784238 is about 1369.1881168258.

The spelling of 2566784238 in words is "two billion, five hundred sixty-six million, seven hundred eighty-four thousand, two hundred thirty-eight".