3257664 has 84 divisors (see below), whose sum is σ = 9290304. Its totient is φ = 1006848.

The previous prime is 3257663. The next prime is 3257671. The reversal of 3257664 is 4667523.

It is a super-2 number, since 2×3257664² = 21224749473792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3257663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69289 + ... + 69335.

Almost surely, 2^3257664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3257664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4645152).

3257664 is an abundant number, since it is smaller than the sum of its proper divisors (6032640).

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

3257664 is a wasteful number, since it uses less digits than its factorization.

3257664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 71 counting only the distinct ones).

The product of its digits is 30240, while the sum is 33.

The square root of 3257664 is about 1804.8999972298. The cubic root of 3257664 is about 148.2411457089.

It can be divided in two parts, 32576 and 64, that added together give a triangular number (32640 = T₂₅₅).

The spelling of 3257664 in words is "three million, two hundred fifty-seven thousand, six hundred sixty-four".