3630520 has 64 divisors (see below), whose sum is σ = 9136800. Its totient is φ = 1290240.

The previous prime is 3630461. The next prime is 3630521. The reversal of 3630520 is 250363.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3630521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12780 + ... + 13060.

Almost surely, 2^3630520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3630520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4568400).

3630520 is an abundant number, since it is smaller than the sum of its proper divisors (5506280).

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

3630520 is a wasteful number, since it uses less digits than its factorization.

3630520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 3630520 is about 1905.3923480480. The cubic root of 3630520 is about 153.6937750218.

Adding to 3630520 its reverse (250363), we get a palindrome (3880883).

The spelling of 3630520 in words is "three million, six hundred thirty thousand, five hundred twenty".