3281996720 has 40 divisors (see below), whose sum is σ = 7637219520. Its totient is φ = 1311667200.

The previous prime is 3281996657. The next prime is 3281996723. The reversal of 3281996720 is 276991823.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×3281996720³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (3281996723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79001 + ... + 113159.

It is an arithmetic number, because the mean of its divisors is an integer number (190930488).

Almost surely, 2^3281996720 is an apocalyptic number.

It is an amenable number.

3281996720 is an abundant number, since it is smaller than the sum of its proper divisors (4355222800).

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

3281996720 is a wasteful number, since it uses less digits than its factorization.

3281996720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35373 (or 35367 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 3281996720 is about 57288.7137226871. The cubic root of 3281996720 is about 1486.0932020639.

It can be divided in two parts, 3281 and 996720, that added together give a palindrome (1000001).

The spelling of 3281996720 in words is "three billion, two hundred eighty-one million, nine hundred ninety-six thousand, seven hundred twenty".