3278664 has 64 divisors (see below), whose sum is σ = 9345600. Its totient is φ = 1064448.

The previous prime is 3278651. The next prime is 3278669. The reversal of 3278664 is 4668723.

It is a super-3 number, since 3×3278664³ (a number of 21 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 3¹³ + 2⁵ + 7² + 8³ + 6² + 6⁸ + 4⁶ .

It is not an unprimeable number, because it can be changed into a prime (3278669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9112 + ... + 9464.

It is an arithmetic number, because the mean of its divisors is an integer number (146025).

Almost surely, 2^3278664 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 3278664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4672800).

3278664 is an abundant number, since it is smaller than the sum of its proper divisors (6066936).

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

3278664 is a wasteful number, since it uses less digits than its factorization.

3278664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 401 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 3278664 is about 1810.7081487639. The cubic root of 3278664 is about 148.5590011442.

The spelling of 3278664 in words is "three million, two hundred seventy-eight thousand, six hundred sixty-four".