1983732426 has 48 divisors (see below), whose sum is σ = 4645335240. Its totient is φ = 608186880.

The previous prime is 1983732419. The next prime is 1983732437. The reversal of 1983732426 is 6242373891.

1983732426 is a `hidden beast` number, since 198 + 3 + 7 + 32 + 426 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1595603025 + 388129401 = 39945^2 + 19701^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50670 + ... + 80838.

Almost surely, 2^1983732426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1983732426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2322667620).

1983732426 is an abundant number, since it is smaller than the sum of its proper divisors (2661602814).

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

1983732426 is a wasteful number, since it uses less digits than its factorization.

1983732426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30471 (or 30468 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 1983732426 is about 44539.1111945445. Note that the first 4 decimals coincide. The cubic root of 1983732426 is about 1256.4957697216.

It can be divided in two parts, 198 and 3732426, that added together give a square (3732624 = 1932²).

The spelling of 1983732426 in words is "one billion, nine hundred eighty-three million, seven hundred thirty-two thousand, four hundred twenty-six".