3640065 has 32 divisors (see below), whose sum is σ = 6846336. Its totient is φ = 1628160.

The previous prime is 3640061. The next prime is 3640073. The reversal of 3640065 is 5600463.

It is not a de Polignac number, because 3640065 - 2² = 3640061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3640061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1297 + ... + 2993.

It is an arithmetic number, because the mean of its divisors is an integer number (213948).

Almost surely, 2^3640065 is an apocalyptic number.

It is an amenable number.

3640065 is a deficient number, since it is larger than the sum of its proper divisors (3206271).

3640065 is a wasteful number, since it uses less digits than its factorization.

3640065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 3640065 is about 1907.8954373864. The cubic root of 3640065 is about 153.8283492537.

The spelling of 3640065 in words is "three million, six hundred forty thousand, sixty-five".