2891230011 has 32 divisors (see below), whose sum is σ = 4314992640. Its totient is φ = 1913284800.

The previous prime is 2891230009. The next prime is 2891230033. The reversal of 2891230011 is 1100321982.

It is not a de Polignac number, because 2891230011 - 2¹ = 2891230009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2891232011) 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 31 ways as a sum of consecutive naturals, for example, 3798871 + ... + 3799631.

It is an arithmetic number, because the mean of its divisors is an integer number (134843520).

Almost surely, 2^2891230011 is an apocalyptic number.

2891230011 is a deficient number, since it is larger than the sum of its proper divisors (1423762629).

2891230011 is a wasteful number, since it uses less digits than its factorization.

2891230011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624 (or 1618 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 2891230011 is about 53770.1591126528. The cubic root of 2891230011 is about 1424.6041803688.

Adding to 2891230011 its reverse (1100321982), we get a palindrome (3991551993).

The spelling of 2891230011 in words is "two billion, eight hundred ninety-one million, two hundred thirty thousand, eleven".