3298520721 has 8 divisors (see below), whose sum is σ = 4441572864. Its totient is φ = 2177241200.

The previous prime is 3298520713. The next prime is 3298520723. The reversal of 3298520721 is 1270258923.

3298520721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3298520721 - 2³ = 3298520713 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3298520721.

It is not an unprimeable number, because it can be changed into a prime (3298520723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5442801 + ... + 5443406.

It is an arithmetic number, because the mean of its divisors is an integer number (555196608).

Almost surely, 2^3298520721 is an apocalyptic number.

It is an amenable number.

3298520721 is a deficient number, since it is larger than the sum of its proper divisors (1143052143).

3298520721 is a wasteful number, since it uses less digits than its factorization.

3298520721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10886311.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 3298520721 is about 57432.7495511054. The cubic root of 3298520721 is about 1488.5830592212.

The spelling of 3298520721 in words is "three billion, two hundred ninety-eight million, five hundred twenty thousand, seven hundred twenty-one".