3205681000 has 32 divisors (see below), whose sum is σ = 7501295880. Its totient is φ = 1282272000.

The previous prime is 3205680941. The next prime is 3205681033. The reversal of 3205681000 is 1865023.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 307581444 + 2898099556 = 17538^2 + 53834^2 .

It is a super-2 number, since 2×3205681000² = 20552781347522000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 1601841 + ... + 1603840.

Almost surely, 2^3205681000 is an apocalyptic number.

It is an amenable number.

3205681000 is an abundant number, since it is smaller than the sum of its proper divisors (4295614880).

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

3205681000 is a wasteful number, since it uses less digits than its factorization.

3205681000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205702 (or 3205688 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 3205681000 is about 56618.7336488551. The cubic root of 3205681000 is about 1474.4841248721.

The spelling of 3205681000 in words is "three billion, two hundred five million, six hundred eighty-one thousand".