2091247872 has 216 divisors, whose sum is σ = 6587828352. Its totient is φ = 587059200.

The previous prime is 2091247859. The next prime is 2091247889. The reversal of 2091247872 is 2787421902.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2295097 + ... + 2296007.

Almost surely, 2^2091247872 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 2091247872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3293914176).

2091247872 is an abundant number, since it is smaller than the sum of its proper divisors (4496580480).

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

2091247872 is an equidigital number, since it uses as much as digits as its factorization.

2091247872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 2091247872 is about 45730.1636996851. The cubic root of 2091247872 is about 1278.7976730697.

The spelling of 2091247872 in words is "two billion, ninety-one million, two hundred forty-seven thousand, eight hundred seventy-two".