2391606 has 96 divisors (see below), whose sum is σ = 6639360. Its totient is φ = 629856.

The previous prime is 2391589. The next prime is 2391629. The reversal of 2391606 is 6061932.

It is a happy number.

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 2391606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64620 + ... + 64656.

It is an arithmetic number, because the mean of its divisors is an integer number (69160).

2^2391606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2391606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3319680).

2391606 is an abundant number, since it is smaller than the sum of its proper divisors (4247754).

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

2391606 is a wasteful number, since it uses less digits than its factorization.

2391606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2391606 is about 1546.4818136661. The cubic root of 2391606 is about 133.7303182382.

The spelling of 2391606 in words is "two million, three hundred ninety-one thousand, six hundred six".