1980640362 has 16 divisors (see below), whose sum is σ = 3966621120. Its totient is φ = 659323392.

The previous prime is 1980640349. The next prime is 1980640379. The reversal of 1980640362 is 2630460891.

It is a self number, because there is not a number n which added to its sum of digits gives 1980640362.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217687 + ... + 226602.

It is an arithmetic number, because the mean of its divisors is an integer number (247913820).

Almost surely, 2^1980640362 is an apocalyptic number.

1980640362 is an abundant number, since it is smaller than the sum of its proper divisors (1985980758).

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

1980640362 is a wasteful number, since it uses less digits than its factorization.

1980640362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445037.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 1980640362 is about 44504.3858737541. The cubic root of 1980640362 is about 1255.8425926347.

The spelling of 1980640362 in words is "one billion, nine hundred eighty million, six hundred forty thousand, three hundred sixty-two".