3640707 has 20 divisors (see below), whose sum is σ = 6216496. Its totient is φ = 2080080.

The previous prime is 3640697. The next prime is 3640711. The reversal of 3640707 is 7070463.

It is not a de Polignac number, because 3640707 - 2⁶ = 3640643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Duffinian number.

3640707 is a modest number, since divided by 707 gives 364 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640717) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2644 + ... + 3777.

Almost surely, 2^3640707 is an apocalyptic number.

3640707 is a deficient number, since it is larger than the sum of its proper divisors (2575789).

3640707 is an equidigital number, since it uses as much as digits as its factorization.

3640707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6440 (or 6431 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 3640707 is about 1908.0636781827. The cubic root of 3640707 is about 153.8373923151.

The spelling of 3640707 in words is "three million, six hundred forty thousand, seven hundred seven".