2091398112 has 72 divisors (see below), whose sum is σ = 6006382200. Its totient is φ = 690220800.

The previous prime is 2091398107. The next prime is 2091398149. The reversal of 2091398112 is 2118931902.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6862 + ... + 65037.

It is an arithmetic number, because the mean of its divisors is an integer number (83421975).

Almost surely, 2^2091398112 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 2091398112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3003191100).

2091398112 is an abundant number, since it is smaller than the sum of its proper divisors (3914984088).

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

2091398112 is a wasteful number, since it uses less digits than its factorization.

2091398112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72016 (or 72005 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 2091398112 is about 45731.8063496294. The cubic root of 2091398112 is about 1278.8282962468.

It can be divided in two parts, 20913 and 98112, that added together give a square (119025 = 345²).

The spelling of 2091398112 in words is "two billion, ninety-one million, three hundred ninety-eight thousand, one hundred twelve".