2081638344 has 32 divisors (see below), whose sum is σ = 5371971840. Its totient is φ = 671496000.

The previous prime is 2081638337. The next prime is 2081638393. The reversal of 2081638344 is 4438361802.

It is a happy number.

It is a super-2 number, since 2×2081638344² = 8666436390422124672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1398207 + ... + 1399694.

It is an arithmetic number, because the mean of its divisors is an integer number (167874120).

Almost surely, 2^2081638344 is an apocalyptic number.

2081638344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2081638344 is an abundant number, since it is smaller than the sum of its proper divisors (3290333496).

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

2081638344 is a wasteful number, since it uses less digits than its factorization.

2081638344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797941 (or 2797937 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 2081638344 is about 45624.9750027329. The cubic root of 2081638344 is about 1276.8359236615.

The spelling of 2081638344 in words is "two billion, eighty-one million, six hundred thirty-eight thousand, three hundred forty-four".