3256220 has 72 divisors (see below), whose sum is σ = 8065008. Its totient is φ = 1094400.

The previous prime is 3256217. The next prime is 3256229. The reversal of 3256220 is 226523.

3256220 = T₂₉₉ + T₃₀₀ + ... + T₃₅₈.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 3256192 and 3256201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3256229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79400 + ... + 79440.

It is an arithmetic number, because the mean of its divisors is an integer number (112014).

Almost surely, 2^3256220 is an apocalyptic number.

It is a pronic number, being equal to 1804×1805.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3256220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4032504).

3256220 is an abundant number, since it is smaller than the sum of its proper divisors (4808788).

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

3256220 is a wasteful number, since it uses less digits than its factorization.

3256220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 3256220 is about 1804.4999307287. The cubic root of 3256220 is about 148.2192392292.

The spelling of 3256220 in words is "three million, two hundred fifty-six thousand, two hundred twenty".