2091275280 has 160 divisors (see below), whose sum is σ = 7582550400. Its totient is φ = 528311808.

The previous prime is 2091275243. The next prime is 2091275297. The reversal of 2091275280 is 825721902.

2091275280 is a `hidden beast` number, since 2 + 0 + 9 + 127 + 528 + 0 = 666.

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

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 31 ways as a sum of consecutive naturals, for example, 15562 + ... + 66518.

It is an arithmetic number, because the mean of its divisors is an integer number (47390940).

Almost surely, 2^2091275280 is an apocalyptic number.

2091275280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2091275280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3791275200).

2091275280 is an abundant number, since it is smaller than the sum of its proper divisors (5491275120).

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

2091275280 is a wasteful number, since it uses less digits than its factorization.

2091275280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50998 (or 50986 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 2091275280 is about 45730.4633696183. The cubic root of 2091275280 is about 1278.8032597076.

The spelling of 2091275280 in words is "two billion, ninety-one million, two hundred seventy-five thousand, two hundred eighty".