3640530 has 16 divisors (see below), whose sum is σ = 8737344. Its totient is φ = 970800.

The previous prime is 3640523. The next prime is 3640537. The reversal of 3640530 is 350463.

It is an interprime number because it is at equal distance from previous prime (3640523) and next prime (3640537).

It is a junction number, because it is equal to n+sod(n) for n = 3640497 and 3640506.

It is not an unprimeable number, because it can be changed into a prime (3640537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60646 + ... + 60705.

It is an arithmetic number, because the mean of its divisors is an integer number (546084).

Almost surely, 2^3640530 is an apocalyptic number.

3640530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3640530 is an abundant number, since it is smaller than the sum of its proper divisors (5096814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3640530 is a wasteful number, since it uses less digits than its factorization.

3640530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121361.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 3640530 is about 1908.0172955191. The cubic root of 3640530 is about 153.8348992408.

Adding to 3640530 its reverse (350463), we get a palindrome (3990993).

The spelling of 3640530 in words is "three million, six hundred forty thousand, five hundred thirty".