2081385872 has 20 divisors (see below), whose sum is σ = 4068376140. Its totient is φ = 1031482368.

The previous prime is 2081385863. The next prime is 2081385947. The reversal of 2081385872 is 2785831802.

It can be written as a sum of positive squares in 2 ways, for example, as 1091905936 + 989479936 = 33044^2 + 31456^2 .

It is a super-2 number, since 2×2081385872² = 8664334296322400768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573797 + ... + 577412.

It is an arithmetic number, because the mean of its divisors is an integer number (203418807).

Almost surely, 2^2081385872 is an apocalyptic number.

It is an amenable number.

2081385872 is a deficient number, since it is larger than the sum of its proper divisors (1986990268).

2081385872 is a wasteful number, since it uses less digits than its factorization.

2081385872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151330 (or 1151324 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 2081385872 is about 45622.2081008800. The cubic root of 2081385872 is about 1276.7843011252.

The spelling of 2081385872 in words is "two billion, eighty-one million, three hundred eighty-five thousand, eight hundred seventy-two".