3280644 has 18 divisors (see below), whose sum is σ = 8292830. Its totient is φ = 1093536.

The previous prime is 3280639. The next prime is 3280649. The reversal of 3280644 is 4460823.

It is an interprime number because it is at equal distance from previous prime (3280639) and next prime (3280649).

It can be written as a sum of positive squares in only one way, i.e., 2762244 + 518400 = 1662^2 + 720^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3280649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45529 + ... + 45600.

Almost surely, 2^3280644 is an apocalyptic number.

It is an amenable number.

3280644 is an abundant number, since it is smaller than the sum of its proper divisors (5012186).

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

3280644 is a wasteful number, since it uses less digits than its factorization.

3280644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91139 (or 91134 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 3280644 is about 1811.2548136582. The cubic root of 3280644 is about 148.5889002769.

The spelling of 3280644 in words is "three million, two hundred eighty thousand, six hundred forty-four".