1982328426 has 72 divisors (see below), whose sum is σ = 4664514816. Its totient is φ = 608156640.

The previous prime is 1982328343. The next prime is 1982328427. The reversal of 1982328426 is 6248232891.

1982328426 is a `hidden beast` number, since 198 + 2 + 32 + 8 + 426 = 666.

It is not an unprimeable number, because it can be changed into a prime (1982328427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1346871 + ... + 1348341.

It is an arithmetic number, because the mean of its divisors is an integer number (64784928).

Almost surely, 2^1982328426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1982328426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2332257408).

1982328426 is an abundant number, since it is smaller than the sum of its proper divisors (2682186390).

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

1982328426 is a wasteful number, since it uses less digits than its factorization.

1982328426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948 (or 1932 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 1982328426 is about 44523.3469766144. The cubic root of 1982328426 is about 1256.1992686427.

The spelling of 1982328426 in words is "one billion, nine hundred eighty-two million, three hundred twenty-eight thousand, four hundred twenty-six".