3630438820 has 12 divisors (see below), whose sum is σ = 7623921564. Its totient is φ = 1452175520.

The previous prime is 3630438809. The next prime is 3630438827. The reversal of 3630438820 is 288340363.

It can be written as a sum of positive squares in 2 ways, for example, as 561500416 + 3068938404 = 23696^2 + 55398^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3630438820.

It is not an unprimeable number, because it can be changed into a prime (3630438827) 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 3 ways as a sum of consecutive naturals, for example, 90760951 + ... + 90760990.

It is an arithmetic number, because the mean of its divisors is an integer number (635326797).

Almost surely, 2^3630438820 is an apocalyptic number.

It is an amenable number.

3630438820 is an abundant number, since it is smaller than the sum of its proper divisors (3993482744).

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

3630438820 is a wasteful number, since it uses less digits than its factorization.

3630438820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181521950 (or 181521948 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 3630438820 is about 60253.1229066179. The cubic root of 3630438820 is about 1536.9262946011.

The spelling of 3630438820 in words is "three billion, six hundred thirty million, four hundred thirty-eight thousand, eight hundred twenty".