3640765 has 8 divisors (see below), whose sum is σ = 4380768. Its totient is φ = 2904720.

The previous prime is 3640753. The next prime is 3640781. The reversal of 3640765 is 5670463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-3640765 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1714 + ... + 3196.

It is an arithmetic number, because the mean of its divisors is an integer number (547596).

Almost surely, 2^3640765 is an apocalyptic number.

It is an amenable number.

3640765 is a deficient number, since it is larger than the sum of its proper divisors (740003).

3640765 is a wasteful number, since it uses less digits than its factorization.

3640765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 3640765 is about 1908.0788767763. The cubic root of 3640765 is about 153.8382092372.

The spelling of 3640765 in words is "three million, six hundred forty thousand, seven hundred sixty-five".