3261220420 has 24 divisors (see below), whose sum is σ = 7209014400. Its totient is φ = 1235830752.

The previous prime is 3261220343. The next prime is 3261220423. The reversal of 3261220420 is 240221623.

It is a junction number, because it is equal to n+sod(n) for n = 3261220391 and 3261220400.

It is not an unprimeable number, because it can be changed into a prime (3261220423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4290700 + ... + 4291459.

It is an arithmetic number, because the mean of its divisors is an integer number (300375600).

Almost surely, 2^3261220420 is an apocalyptic number.

It is an amenable number.

3261220420 is an abundant number, since it is smaller than the sum of its proper divisors (3947793980).

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

3261220420 is a wasteful number, since it uses less digits than its factorization.

3261220420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8582187 (or 8582185 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 3261220420 is about 57107.0960564447. The cubic root of 3261220420 is about 1482.9507147072.

The spelling of 3261220420 in words is "three billion, two hundred sixty-one million, two hundred twenty thousand, four hundred twenty".