3640847 has 12 divisors (see below), whose sum is σ = 4302360. Its totient is φ = 3071376.

The previous prime is 3640843. The next prime is 3640849. The reversal of 3640847 is 7480463.

It is a happy number.

It is not a de Polignac number, because 3640847 - 2² = 3640843 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640843) 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 11 ways as a sum of consecutive naturals, for example, 2729 + ... + 3837.

It is an arithmetic number, because the mean of its divisors is an integer number (358530).

Almost surely, 2^3640847 is an apocalyptic number.

3640847 is a deficient number, since it is larger than the sum of its proper divisors (661513).

3640847 is a wasteful number, since it uses less digits than its factorization.

3640847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190 (or 1183 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 3640847 is about 1908.1003642366. The cubic root of 3640847 is about 153.8393641811.

The spelling of 3640847 in words is "three million, six hundred forty thousand, eight hundred forty-seven".