1982797056 has 90 divisors (see below), whose sum is σ = 5912403882. Its totient is φ = 660925440.

The previous prime is 1982797051. The next prime is 1982797067. The reversal of 1982797056 is 6507972891.

It can be written as a sum of positive squares in only one way, i.e., 1731891456 + 250905600 = 41616^2 + 15840^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1982796993 and 1982797011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982797051) 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 9 ways as a sum of consecutive naturals, for example, 27075 + ... + 68546.

Almost surely, 2^1982797056 is an apocalyptic number.

1982797056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1982797056 is an abundant number, since it is smaller than the sum of its proper divisors (3929606826).

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

1982797056 is an frugal number, since it uses more digits than its factorization.

1982797056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95649 (or 95626 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The square root of 1982797056 is about 44528.6094101309. The cubic root of 1982797056 is about 1256.2982509424.

The spelling of 1982797056 in words is "one billion, nine hundred eighty-two million, seven hundred ninety-seven thousand, fifty-six".