3215616 has 72 divisors (see below), whose sum is σ = 8830080. Its totient is φ = 1038336.

The previous prime is 3215603. The next prime is 3215623. The reversal of 3215616 is 6165123.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40665 + ... + 40743.

It is an arithmetic number, because the mean of its divisors is an integer number (122640).

Almost surely, 2^3215616 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 3215616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4415040).

3215616 is an abundant number, since it is smaller than the sum of its proper divisors (5614464).

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

3215616 is an equidigital number, since it uses as much as digits as its factorization.

3215616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 137 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 3215616 is about 1793.2138745838. The cubic root of 3215616 is about 147.6005787244.

The spelling of 3215616 in words is "three million, two hundred fifteen thousand, six hundred sixteen".