3257320 has 48 divisors (see below), whose sum is σ = 8067780. Its totient is φ = 1182720.

The previous prime is 3257299. The next prime is 3257347. The reversal of 3257320 is 237523.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3175524 + 81796 = 1782^2 + 286^2 .

It is a super-2 number, since 2×3257320² = 21220267164800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 3257291 and 3257300.

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, 4504 + ... + 5176.

Almost surely, 2^3257320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3257320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4033890).

3257320 is an abundant number, since it is smaller than the sum of its proper divisors (4810460).

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

3257320 is a wasteful number, since it uses less digits than its factorization.

3257320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 22.

The square root of 3257320 is about 1804.8046985754. The cubic root of 3257320 is about 148.2359275782.

The spelling of 3257320 in words is "three million, two hundred fifty-seven thousand, three hundred twenty".