3520566720 has 448 divisors, whose sum is σ = 14352422400. Its totient is φ = 802897920.

The previous prime is 3520566689. The next prime is 3520566769. The reversal of 3520566720 is 276650253.

It is a happy number.

3520566720 is a `hidden beast` number, since 3 + 5 + 20 + 566 + 72 + 0 = 666.

3520566720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63 ways as a sum of consecutive naturals, for example, 1614591 + ... + 1616769.

Almost surely, 2^3520566720 is an apocalyptic number.

3520566720 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 3520566720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7176211200).

3520566720 is an abundant number, since it is smaller than the sum of its proper divisors (10831855680).

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

3520566720 is a wasteful number, since it uses less digits than its factorization.

3520566720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233 (or 2217 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 3520566720 is about 59334.3637363712. The cubic root of 3520566720 is about 1521.2626166366.

The spelling of 3520566720 in words is "three billion, five hundred twenty million, five hundred sixty-six thousand, seven hundred twenty".