3618601728 has 144 divisors (see below), whose sum is σ = 11362154496. Its totient is φ = 1000488960.

The previous prime is 3618601717. The next prime is 3618601741. The reversal of 3618601728 is 8271068163.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 3618601728.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155800 + ... + 177512.

Almost surely, 2^3618601728 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 3618601728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5681077248).

3618601728 is an abundant number, since it is smaller than the sum of its proper divisors (7743552768).

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

3618601728 is a wasteful number, since it uses less digits than its factorization.

3618601728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21770 (or 21756 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 3618601728 is about 60154.8146701492. The cubic root of 3618601728 is about 1535.2540866124.

The spelling of 3618601728 in words is "three billion, six hundred eighteen million, six hundred one thousand, seven hundred twenty-eight".