3285720 has 48 divisors (see below), whose sum is σ = 10679760. Its totient is φ = 876096.

The previous prime is 3285719. The next prime is 3285739. The reversal of 3285720 is 275823.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4204 + ... + 4923.

It is an arithmetic number, because the mean of its divisors is an integer number (222495).

Almost surely, 2^3285720 is an apocalyptic number.

3285720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3285720 is an abundant number, since it is smaller than the sum of its proper divisors (7394040).

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

3285720 is a wasteful number, since it uses less digits than its factorization.

3285720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9144 (or 9137 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 3285720 is about 1812.6555105701. The cubic root of 3285720 is about 148.6654958673.

It can be divided in two parts, 3285 and 720, that added together give a triangular number (4005 = T₈₉).

The spelling of 3285720 in words is "three million, two hundred eighty-five thousand, seven hundred twenty".