2081597840 has 40 divisors (see below), whose sum is σ = 5531104320. Its totient is φ = 713690496.

The previous prime is 2081597831. The next prime is 2081597887. The reversal of 2081597840 is 487951802.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 2081597791 and 2081597800.

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 7 ways as a sum of consecutive naturals, for example, 1858010 + ... + 1859129.

It is an arithmetic number, because the mean of its divisors is an integer number (138277608).

Almost surely, 2^2081597840 is an apocalyptic number.

2081597840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2081597840 is an abundant number, since it is smaller than the sum of its proper divisors (3449506480).

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

2081597840 is a wasteful number, since it uses less digits than its factorization.

2081597840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3717159 (or 3717153 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 2081597840 is about 45624.5311208784. The cubic root of 2081597840 is about 1276.8276421561.

The spelling of 2081597840 in words is "two billion, eighty-one million, five hundred ninety-seven thousand, eight hundred forty".