3639024128 has 20 divisors (see below), whose sum is σ = 7270941810. Its totient is φ = 1819511808.

The previous prime is 3639024121. The next prime is 3639024133. The reversal of 3639024128 is 8214209363.

It can be written as a sum of positive squares in only one way, i.e., 3632713984 + 6310144 = 60272^2 + 2512^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3639024091 and 3639024100.

It is not an unprimeable number, because it can be changed into a prime (3639024121) 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 as a sum of consecutive naturals, namely, 3553223 + ... + 3554246.

Almost surely, 2^3639024128 is an apocalyptic number.

It is an amenable number.

3639024128 is a deficient number, since it is larger than the sum of its proper divisors (3631917682).

3639024128 is an frugal number, since it uses more digits than its factorization.

3639024128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7107487 (or 7107471 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 3639024128 is about 60324.3245134166. The cubic root of 3639024128 is about 1538.1368551500.

The spelling of 3639024128 in words is "three billion, six hundred thirty-nine million, twenty-four thousand, one hundred twenty-eight".