3291816 has 64 divisors (see below), whose sum is σ = 9247680. Its totient is φ = 967680.

The previous prime is 3291793. The next prime is 3291817. The reversal of 3291816 is 6181923.

It is a hoax number, since the sum of its digits (30) 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 (3291817) 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, 9600 + ... + 9936.

It is an arithmetic number, because the mean of its divisors is an integer number (144495).

Almost surely, 2^3291816 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 3291816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4623840).

3291816 is an abundant number, since it is smaller than the sum of its proper divisors (5955864).

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

3291816 is a wasteful number, since it uses less digits than its factorization.

3291816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 390 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 3291816 is about 1814.3362422660. The cubic root of 3291816 is about 148.7573788209.

It can be divided in two parts, 329 and 1816, that added together give a triangular number (2145 = T₆₅).

The spelling of 3291816 in words is "three million, two hundred ninety-one thousand, eight hundred sixteen".