3655989960 has 288 divisors, whose sum is σ = 13203881280. Its totient is φ = 807448320.

The previous prime is 3655989959. The next prime is 3655989973. The reversal of 3655989960 is 699895563.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 3655989894 and 3655989903.

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 71 ways as a sum of consecutive naturals, for example, 5650357 + ... + 5651003.

It is an arithmetic number, because the mean of its divisors is an integer number (45846810).

Almost surely, 2^3655989960 is an apocalyptic number.

3655989960 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3655989960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6601940640).

3655989960 is an abundant number, since it is smaller than the sum of its proper divisors (9547891320).

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

3655989960 is a wasteful number, since it uses less digits than its factorization.

3655989960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 15746400, while the sum is 60.

The square root of 3655989960 is about 60464.7828078461. The cubic root of 3655989960 is about 1540.5235134747.

The spelling of 3655989960 in words is "three billion, six hundred fifty-five million, nine hundred eighty-nine thousand, nine hundred sixty".