1643442282 has 12 divisors (see below), whose sum is σ = 3560791650. Its totient is φ = 547814088.

The previous prime is 1643442271. The next prime is 1643442287. The reversal of 1643442282 is 2822443461.

1643442282 is a `hidden beast` number, since 1 + 643 + 4 + 4 + 2 + 2 + 8 + 2 = 666.

1643442282 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1641951441 + 1490841 = 40521^2 + 1221^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1643442287) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45651157 + ... + 45651192.

Almost surely, 2^1643442282 is an apocalyptic number.

1643442282 is an abundant number, since it is smaller than the sum of its proper divisors (1917349368).

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

1643442282 is a wasteful number, since it uses less digits than its factorization.

1643442282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91302357 (or 91302354 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 1643442282 is about 40539.3917319932. The cubic root of 1643442282 is about 1180.0982112071.

The spelling of 1643442282 in words is "one billion, six hundred forty-three million, four hundred forty-two thousand, two hundred eighty-two".