3264640 has 32 divisors (see below), whose sum is σ = 7806060. Its totient is φ = 1305600.

The previous prime is 3264631. The next prime is 3264649. The reversal of 3264640 is 464623.

It is an interprime number because it is at equal distance from previous prime (3264631) and next prime (3264649).

It can be written as a sum of positive squares in 2 ways, for example, as 2637376 + 627264 = 1624^2 + 792^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (3264649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1911 + ... + 3190.

Almost surely, 2^3264640 is an apocalyptic number.

It is an amenable number.

3264640 is an abundant number, since it is smaller than the sum of its proper divisors (4541420).

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

3264640 is an equidigital number, since it uses as much as digits as its factorization.

3264640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5120 (or 5108 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 3264640 is about 1806.8314807973. The cubic root of 3264640 is about 148.3468853783.

The spelling of 3264640 in words is "three million, two hundred sixty-four thousand, six hundred forty".