3640949 has 16 divisors (see below), whose sum is σ = 4112640. Its totient is φ = 3201600.

The previous prime is 3640937. The next prime is 3640991. The reversal of 3640949 is 9490463.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3640949 - 2⁴ = 3640933 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 (3640909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35999 + ... + 36099.

It is an arithmetic number, because the mean of its divisors is an integer number (257040).

Almost surely, 2^3640949 is an apocalyptic number.

It is an amenable number.

3640949 is a deficient number, since it is larger than the sum of its proper divisors (471691).

3640949 is a wasteful number, since it uses less digits than its factorization.

3640949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 3640949 is about 1908.1270922032. The cubic root of 3640949 is about 153.8408007945.

The spelling of 3640949 in words is "three million, six hundred forty thousand, nine hundred forty-nine".