3656240 has 40 divisors (see below), whose sum is σ = 9716640. Its totient is φ = 1253376.

The previous prime is 3656239. The next prime is 3656249. The reversal of 3656240 is 426563.

3656240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (3656249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2705 + ... + 3824.

It is an arithmetic number, because the mean of its divisors is an integer number (242916).

Almost surely, 2^3656240 is an apocalyptic number.

It is an amenable number.

3656240 is an abundant number, since it is smaller than the sum of its proper divisors (6060400).

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

3656240 is a wasteful number, since it uses less digits than its factorization.

3656240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6549 (or 6543 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 3656240 is about 1912.1297027137. The cubic root of 3656240 is about 154.0558632437.

The spelling of 3656240 in words is "three million, six hundred fifty-six thousand, two hundred forty".