1980392756 has 12 divisors (see below), whose sum is σ = 3504628260. Its totient is φ = 979070400.

The previous prime is 1980392693. The next prime is 1980392779. The reversal of 1980392756 is 6572930891.

It can be written as a sum of positive squares in 2 ways, for example, as 1266648100 + 713744656 = 35590^2 + 26716^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2781095 + ... + 2781806.

It is an arithmetic number, because the mean of its divisors is an integer number (292052355).

Almost surely, 2^1980392756 is an apocalyptic number.

It is an amenable number.

1980392756 is a deficient number, since it is larger than the sum of its proper divisors (1524235504).

1980392756 is a wasteful number, since it uses less digits than its factorization.

1980392756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562994 (or 5562992 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 1980392756 is about 44501.6039710930. The cubic root of 1980392756 is about 1255.7902581935.

The spelling of 1980392756 in words is "one billion, nine hundred eighty million, three hundred ninety-two thousand, seven hundred fifty-six".