2538789891 has 32 divisors (see below), whose sum is σ = 3923424000. Its totient is φ = 1445431680.

The previous prime is 2538789859. The next prime is 2538789893. The reversal of 2538789891 is 1989878352.

It is not a de Polignac number, because 2538789891 - 2⁵ = 2538789859 is a prime.

It is a super-2 number, since 2×2538789891² = 12890908221287583762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2538789893) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 441 + ... + 71258.

It is an arithmetic number, because the mean of its divisors is an integer number (122607000).

Almost surely, 2^2538789891 is an apocalyptic number.

2538789891 is a deficient number, since it is larger than the sum of its proper divisors (1384634109).

2538789891 is a wasteful number, since it uses less digits than its factorization.

2538789891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71779.

The product of its digits is 8709120, while the sum is 60.

The square root of 2538789891 is about 50386.4058154578. The cubic root of 2538789891 is about 1364.1922777060.

The spelling of 2538789891 in words is "two billion, five hundred thirty-eight million, seven hundred eighty-nine thousand, eight hundred ninety-one".