3502620644 has 12 divisors (see below), whose sum is σ = 6144148668. Its totient is φ = 1747149600.

The previous prime is 3502620631. The next prime is 3502620647. The reversal of 3502620644 is 4460262053.

It can be written as a sum of positive squares in 2 ways, for example, as 108160000 + 3394460644 = 10400^2 + 58262^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3502620644.

It is not an unprimeable number, because it can be changed into a prime (3502620647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1038287 + ... + 1041654.

It is an arithmetic number, because the mean of its divisors is an integer number (512012389).

Almost surely, 2^3502620644 is an apocalyptic number.

It is an amenable number.

3502620644 is a deficient number, since it is larger than the sum of its proper divisors (2641528024).

3502620644 is a wasteful number, since it uses less digits than its factorization.

3502620644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080366 (or 2080364 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 3502620644 is about 59182.9421708654. The cubic root of 3502620644 is about 1518.6733351446.

Adding to 3502620644 its reverse (4460262053), we get a palindrome (7962882697).

The spelling of 3502620644 in words is "three billion, five hundred two million, six hundred twenty thousand, six hundred forty-four".