3281782642 has 4 divisors (see below), whose sum is σ = 4922673966. Its totient is φ = 1640891320.

The previous prime is 3281782627. The next prime is 3281782649. The reversal of 3281782642 is 2462871823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2462871823 = 2861 ⋅860843.

It can be written as a sum of positive squares in only one way, i.e., 2428616961 + 853165681 = 49281^2 + 29209^2 .

It is not an unprimeable number, because it can be changed into a prime (3281782649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820445659 + ... + 820445662.

Almost surely, 2^3281782642 is an apocalyptic number.

3281782642 is a deficient number, since it is larger than the sum of its proper divisors (1640891324).

3281782642 is a wasteful number, since it uses less digits than its factorization.

3281782642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640891323.

The product of its digits is 258048, while the sum is 43.

The square root of 3281782642 is about 57286.8452788247. The cubic root of 3281782642 is about 1486.0608897446.

The spelling of 3281782642 in words is "three billion, two hundred eighty-one million, seven hundred eighty-two thousand, six hundred forty-two".