2945646 has 96 divisors (see below), whose sum is σ = 7862400. Its totient is φ = 816480.

The previous prime is 2945639. The next prime is 2945647. The reversal of 2945646 is 6465492.

2945646 is a `hidden beast` number, since 2 + 9 + 4 + 5 + 646 = 666.

Its product of digits (51840) is a multiple of the sum of its prime divisors (64).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2945646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2945647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101560 + ... + 101588.

It is an arithmetic number, because the mean of its divisors is an integer number (81900).

2^2945646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2945646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3931200).

2945646 is an abundant number, since it is smaller than the sum of its proper divisors (4916754).

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

2945646 is a wasteful number, since it uses less digits than its factorization.

2945646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 64 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2945646 is about 1716.2884372972. The cubic root of 2945646 is about 143.3486204475.

The spelling of 2945646 in words is "two million, nine hundred forty-five thousand, six hundred forty-six".