3640783 has 4 divisors (see below), whose sum is σ = 3645208. Its totient is φ = 3636360.

The previous prime is 3640781. The next prime is 3640789. The reversal of 3640783 is 3870463.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3870463 = 23 ⋅168281.

It is a cyclic number.

It is not a de Polignac number, because 3640783 - 2¹ = 3640781 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 (3640781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573 + ... + 2758.

It is an arithmetic number, because the mean of its divisors is an integer number (911302).

Almost surely, 2^3640783 is an apocalyptic number.

3640783 is a deficient number, since it is larger than the sum of its proper divisors (4425).

3640783 is a wasteful number, since it uses less digits than its factorization.

3640783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4424.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 3640783 is about 1908.0835935566. The cubic root of 3640783 is about 153.8384627629.

The spelling of 3640783 in words is "three million, six hundred forty thousand, seven hundred eighty-three".