3640769 has 6 divisors (see below), whose sum is σ = 4001970. Its totient is φ = 3309680.

The previous prime is 3640753. The next prime is 3640781. The reversal of 3640769 is 9670463.

It can be written as a sum of positive squares in only one way, i.e., 3097600 + 543169 = 1760^2 + 737^2 .

It is not a de Polignac number, because 3640769 - 2⁴ = 3640753 is a prime.

It is a super-2 number, since 2×3640769² = 26510397822722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon 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 5 ways as a sum of consecutive naturals, for example, 14924 + ... + 15165.

It is an arithmetic number, because the mean of its divisors is an integer number (666995).

Almost surely, 2^3640769 is an apocalyptic number.

It is an amenable number.

3640769 is a deficient number, since it is larger than the sum of its proper divisors (361201).

3640769 is a wasteful number, since it uses less digits than its factorization.

3640769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30111 (or 30100 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 3640769 is about 1908.0799249507. The cubic root of 3640769 is about 153.8382655763.

The spelling of 3640769 in words is "three million, six hundred forty thousand, seven hundred sixty-nine".