2391216 has 40 divisors (see below), whose sum is σ = 6380544. Its totient is φ = 770880.

The previous prime is 2391167. The next prime is 2391227. The reversal of 2391216 is 6121932.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685 + ... + 2291.

2^2391216 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 2391216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3190272).

2391216 is an abundant number, since it is smaller than the sum of its proper divisors (3989328).

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

2391216 is a wasteful number, since it uses less digits than its factorization.

2391216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649 (or 1643 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

The square root of 2391216 is about 1546.3557158688. The cubic root of 2391216 is about 133.7230486936.

The spelling of 2391216 in words is "two million, three hundred ninety-one thousand, two hundred sixteen".