1880728636 has 12 divisors (see below), whose sum is σ = 3291888600. Its totient is φ = 940189040.

The previous prime is 1880728631. The next prime is 1880728639. The reversal of 1880728636 is 6368270881.

It is a self number, because there is not a number n which added to its sum of digits gives 1880728636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1880728631) 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, 17986 + ... + 63913.

It is an arithmetic number, because the mean of its divisors is an integer number (274324050).

Almost surely, 2^1880728636 is an apocalyptic number.

It is an amenable number.

1880728636 is a deficient number, since it is larger than the sum of its proper divisors (1411159964).

1880728636 is a wasteful number, since it uses less digits than its factorization.

1880728636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87644 (or 87642 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 1880728636 is about 43367.3683315001. The cubic root of 1880728636 is about 1234.3605853712.

The spelling of 1880728636 in words is "one billion, eight hundred eighty million, seven hundred twenty-eight thousand, six hundred thirty-six".