3280521540 has 48 divisors (see below), whose sum is σ = 9341156160. Its totient is φ = 859977600.

The previous prime is 3280521539. The next prime is 3280521547. The reversal of 3280521540 is 451250823.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3280521498 and 3280521507.

It is not an unprimeable number, because it can be changed into a prime (3280521547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459811 + ... + 466890.

It is an arithmetic number, because the mean of its divisors is an integer number (194607420).

Almost surely, 2^3280521540 is an apocalyptic number.

3280521540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3280521540 is an abundant number, since it is smaller than the sum of its proper divisors (6060634620).

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

3280521540 is a wasteful number, since it uses less digits than its factorization.

3280521540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926772 (or 926770 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 3280521540 is about 57275.8373138272. The cubic root of 3280521540 is about 1485.8705140994.

It can be divided in two parts, 32805 and 21540, that added together give a palindrome (54345).

The spelling of 3280521540 in words is "three billion, two hundred eighty million, five hundred twenty-one thousand, five hundred forty".