3640743 has 6 divisors (see below), whose sum is σ = 5258864. Its totient is φ = 2427156.

The previous prime is 3640717. The next prime is 3640753. The reversal of 3640743 is 3470463.

It is not a de Polignac number, because 3640743 - 2⁵ = 3640711 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 (3640753) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 202255 + ... + 202272.

Almost surely, 2^3640743 is an apocalyptic number.

3640743 is a deficient number, since it is larger than the sum of its proper divisors (1618121).

3640743 is a wasteful number, since it uses less digits than its factorization.

3640743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404533 (or 404530 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 3640743 is about 1908.0731118068. The cubic root of 3640743 is about 153.8378993712.

The spelling of 3640743 in words is "three million, six hundred forty thousand, seven hundred forty-three".