3640512 has 56 divisors (see below), whose sum is σ = 9810496. Its totient is φ = 1191168.

The previous prime is 3640493. The next prime is 3640519. The reversal of 3640512 is 2150463.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3640519) 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, 12723 + ... + 13005.

Almost surely, 2^3640512 is an apocalyptic number.

3640512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3640512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4905248).

3640512 is an abundant number, since it is smaller than the sum of its proper divisors (6169984).

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

3640512 is a wasteful number, since it uses less digits than its factorization.

3640512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 3640512 is about 1908.0125785749. The cubic root of 3640512 is about 153.8346457033.

Adding to 3640512 its reverse (2150463), we get a palindrome (5790975).

The spelling of 3640512 in words is "three million, six hundred forty thousand, five hundred twelve".