3215916 has 48 divisors (see below), whose sum is σ = 9098880. Its totient is φ = 974160.

The previous prime is 3215911. The next prime is 3215923. The reversal of 3215916 is 6195123.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 3215916.

It is not an unprimeable number, because it can be changed into a prime (3215911) 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, 166 + ... + 2541.

It is an arithmetic number, because the mean of its divisors is an integer number (189560).

Almost surely, 2^3215916 is an apocalyptic number.

3215916 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3215916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4549440).

3215916 is an abundant number, since it is smaller than the sum of its proper divisors (5882964).

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

3215916 is a wasteful number, since it uses less digits than its factorization.

3215916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731 (or 2723 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 3215916 is about 1793.2975213277. The cubic root of 3215916 is about 147.6051687000.

The spelling of 3215916 in words is "three million, two hundred fifteen thousand, nine hundred sixteen".