3640749 has 12 divisors (see below), whose sum is σ = 5647104. Its totient is φ = 2080344.

The previous prime is 3640717. The next prime is 3640753. The reversal of 3640749 is 9470463.

It is not a de Polignac number, because 3640749 - 2⁵ = 3640717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12237 + ... + 12530.

It is an arithmetic number, because the mean of its divisors is an integer number (470592).

Almost surely, 2^3640749 is an apocalyptic number.

It is an amenable number.

3640749 is a deficient number, since it is larger than the sum of its proper divisors (2006355).

3640749 is a wasteful number, since it uses less digits than its factorization.

3640749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24784 (or 24777 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 3640749 is about 1908.0746840729. The cubic root of 3640749 is about 153.8379838802.

The spelling of 3640749 in words is "three million, six hundred forty thousand, seven hundred forty-nine".