3246640 has 20 divisors (see below), whose sum is σ = 7548624. Its totient is φ = 1298624.

The previous prime is 3246613. The next prime is 3246641. The reversal of 3246640 is 466423.

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

It is a super-4 number, since 4×3246640⁴ (a number of 27 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (3246641) 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, 20212 + ... + 20371.

Almost surely, 2^3246640 is an apocalyptic number.

It is an amenable number.

3246640 is an abundant number, since it is smaller than the sum of its proper divisors (4301984).

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

3246640 is a wasteful number, since it uses less digits than its factorization.

3246640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40596 (or 40590 counting only the distinct ones).

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

The square root of 3246640 is about 1801.8435004184. The cubic root of 3246640 is about 148.0737397329.

The spelling of 3246640 in words is "three million, two hundred forty-six thousand, six hundred forty".