3656064440 has 64 divisors (see below), whose sum is σ = 9593208000. Its totient is φ = 1253503104.

The previous prime is 3656064403. The next prime is 3656064469. The reversal of 3656064440 is 444606563.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3656064394 and 3656064403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119519 + ... + 146958.

It is an arithmetic number, because the mean of its divisors is an integer number (149893875).

Almost surely, 2^3656064440 is an apocalyptic number.

It is an amenable number.

3656064440 is an abundant number, since it is smaller than the sum of its proper divisors (5937143560).

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

3656064440 is a wasteful number, since it uses less digits than its factorization.

3656064440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266509 (or 266491 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 38.

The square root of 3656064440 is about 60465.3987004138. The cubic root of 3656064440 is about 1540.5339746096.

The spelling of 3656064440 in words is "three billion, six hundred fifty-six million, sixty-four thousand, four hundred forty".