3256720 has 20 divisors (see below), whose sum is σ = 7572060. Its totient is φ = 1302656.

The previous prime is 3256717. The next prime is 3256723. The reversal of 3256720 is 276523.

It is an interprime number because it is at equal distance from previous prime (3256717) and next prime (3256723).

It can be written as a sum of positive squares in 2 ways, for example, as 1089936 + 2166784 = 1044^2 + 1472^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (3256723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20275 + ... + 20434.

It is an arithmetic number, because the mean of its divisors is an integer number (378603).

Almost surely, 2^3256720 is an apocalyptic number.

It is an amenable number.

3256720 is an abundant number, since it is smaller than the sum of its proper divisors (4315340).

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

3256720 is a wasteful number, since it uses less digits than its factorization.

3256720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40722 (or 40716 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 3256720 is about 1804.6384679486. The cubic root of 3256720 is about 148.2268253082.

The spelling of 3256720 in words is "three million, two hundred fifty-six thousand, seven hundred twenty".