3256840 has 16 divisors (see below), whose sum is σ = 7327980. Its totient is φ = 1302720.

The previous prime is 3256831. The next prime is 3256861. The reversal of 3256840 is 486523.

It can be written as a sum of positive squares in 2 ways, for example, as 3020644 + 236196 = 1738^2 + 486^2 .

It is a d-powerful number, because it can be written as 3 + 2²¹ + 5⁷ + 6³ + 8⁵ + 4¹⁰ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 3256799 and 3256808.

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, 40671 + ... + 40750.

Almost surely, 2^3256840 is an apocalyptic number.

It is an amenable number.

3256840 is an abundant number, since it is smaller than the sum of its proper divisors (4071140).

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

3256840 is a wasteful number, since it uses less digits than its factorization.

3256840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81432 (or 81428 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 3256840 is about 1804.6717152989. The cubic root of 3256840 is about 148.2286458517.

It can be divided in two parts, 3256 and 840, that added together give a 12-th power (4096 = 2¹²).

The spelling of 3256840 in words is "three million, two hundred fifty-six thousand, eight hundred forty".