2891047236 has 144 divisors (see below), whose sum is σ = 8856267840. Its totient is φ = 724980480.

The previous prime is 2891047223. The next prime is 2891047279. The reversal of 2891047236 is 6327401982.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 179866 + ... + 195278.

It is an arithmetic number, because the mean of its divisors is an integer number (61501860).

Almost surely, 2^2891047236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2891047236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4428133920).

2891047236 is an abundant number, since it is smaller than the sum of its proper divisors (5965220604).

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

2891047236 is a wasteful number, since it uses less digits than its factorization.

2891047236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15474 (or 15465 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 2891047236 is about 53768.4594906717. The cubic root of 2891047236 is about 1424.5741599836.

The spelling of 2891047236 in words is "two billion, eight hundred ninety-one million, forty-seven thousand, two hundred thirty-six".