3651733728 has 144 divisors (see below), whose sum is σ = 11117433600. Its totient is φ = 1133533440.

The previous prime is 3651733727. The next prime is 3651733733. The reversal of 3651733728 is 8273371563.

3651733728 is a `hidden beast` number, since 36 + 517 + 33 + 72 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3651733721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 317193 + ... + 328503.

It is an arithmetic number, because the mean of its divisors is an integer number (77204400).

Almost surely, 2^3651733728 is an apocalyptic number.

3651733728 is a gapful number since it is divisible by the number (38) 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 3651733728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5558716800).

3651733728 is an abundant number, since it is smaller than the sum of its proper divisors (7465699872).

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

3651733728 is a wasteful number, since it uses less digits than its factorization.

3651733728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11405 (or 11394 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 3651733728 is about 60429.5765995427. The cubic root of 3651733728 is about 1539.9254655555.

The spelling of 3651733728 in words is "three billion, six hundred fifty-one million, seven hundred thirty-three thousand, seven hundred twenty-eight".