3520352220 has 288 divisors, whose sum is σ = 12625611264. Its totient is φ = 717150720.

The previous prime is 3520352179. The next prime is 3520352221. The reversal of 3520352220 is 222530253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3520352221) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2692807 + ... + 2694113.

It is an arithmetic number, because the mean of its divisors is an integer number (43838928).

Almost surely, 2^3520352220 is an apocalyptic number.

3520352220 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 3520352220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6312805632).

3520352220 is an abundant number, since it is smaller than the sum of its proper divisors (9105259044).

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

3520352220 is a wasteful number, since it uses less digits than its factorization.

3520352220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401 (or 1388 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 3520352220 is about 59332.5561559588. The cubic root of 3520352220 is about 1521.2317203364.

Adding to 3520352220 its reverse (222530253), we get a palindrome (3742882473).

The spelling of 3520352220 in words is "three billion, five hundred twenty million, three hundred fifty-two thousand, two hundred twenty".