3656559928 has 96 divisors (see below), whose sum is σ = 8331735600. Its totient is φ = 1498549248.

The previous prime is 3656559923. The next prime is 3656559931. The reversal of 3656559928 is 8299556563.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656559923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 853600 + ... + 857872.

Almost surely, 2^3656559928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3656559928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4165867800).

3656559928 is an abundant number, since it is smaller than the sum of its proper divisors (4675175672).

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

3656559928 is a wasteful number, since it uses less digits than its factorization.

3656559928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4389 (or 4378 counting only the distinct ones).

The product of its digits is 17496000, while the sum is 58.

The square root of 3656559928 is about 60469.4958470798. The cubic root of 3656559928 is about 1540.6035650695.

The spelling of 3656559928 in words is "three billion, six hundred fifty-six million, five hundred fifty-nine thousand, nine hundred twenty-eight".