3606721920 has 192 divisors, whose sum is σ = 12666747600. Its totient is φ = 945401856.

The previous prime is 3606721913. The next prime is 3606721933. The reversal of 3606721920 is 291276063.

3606721920 is a `hidden beast` number, since 3 + 606 + 7 + 21 + 9 + 20 = 666.

3606721920 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 334534 + ... + 345146.

Almost surely, 2^3606721920 is an apocalyptic number.

3606721920 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 3606721920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6333373800).

3606721920 is an abundant number, since it is smaller than the sum of its proper divisors (9060025680).

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

3606721920 is a wasteful number, since it uses less digits than its factorization.

3606721920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10697 (or 10682 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 3606721920 is about 60055.9898761148. The cubic root of 3606721920 is about 1533.5721736751.

Adding to 3606721920 its reverse (291276063), we get a palindrome (3897997983).

The spelling of 3606721920 in words is "three billion, six hundred six million, seven hundred twenty-one thousand, nine hundred twenty".