3640651 has 12 divisors (see below), whose sum is σ = 4268160. Its totient is φ = 3096240.

The previous prime is 3640649. The next prime is 3640661. The reversal of 3640651 is 1560463.

It is not a de Polignac number, because 3640651 - 2¹ = 3640649 is a prime.

It is a Duffinian number.

3640651 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3640661) 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, 9165 + ... + 9553.

It is an arithmetic number, because the mean of its divisors is an integer number (355680).

Almost surely, 2^3640651 is an apocalyptic number.

3640651 is a deficient number, since it is larger than the sum of its proper divisors (627509).

3640651 is a wasteful number, since it uses less digits than its factorization.

3640651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594 (or 587 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 3640651 is about 1908.0490035636. The cubic root of 3640651 is about 153.8366035546.

The spelling of 3640651 in words is "three million, six hundred forty thousand, six hundred fifty-one".