3640646 has 16 divisors (see below), whose sum is σ = 5618160. Its totient is φ = 1768800.

The previous prime is 3640643. The next prime is 3640649. The reversal of 3640646 is 6460463.

It is an interprime number because it is at equal distance from previous prime (3640643) and next prime (3640649).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13400 + ... + 13668.

It is an arithmetic number, because the mean of its divisors is an integer number (351135).

Almost surely, 2^3640646 is an apocalyptic number.

3640646 is a deficient number, since it is larger than the sum of its proper divisors (1977514).

3640646 is a wasteful number, since it uses less digits than its factorization.

3640646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 3640646 is about 1908.0476933243. The cubic root of 3640646 is about 153.8365331292.

The spelling of 3640646 in words is "three million, six hundred forty thousand, six hundred forty-six".