3828730521 has 24 divisors (see below), whose sum is σ = 6412864192. Its totient is φ = 1988949600.

The previous prime is 3828730519. The next prime is 3828730537. The reversal of 3828730521 is 1250378283.

3828730521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3828730521 - 2¹ = 3828730519 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 3828730521.

It is not an unprimeable number, because it can be changed into a prime (3828730501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 750850 + ... + 755931.

Almost surely, 2^3828730521 is an apocalyptic number.

It is an amenable number.

3828730521 is a deficient number, since it is larger than the sum of its proper divisors (2584133671).

3828730521 is a wasteful number, since it uses less digits than its factorization.

3828730521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506813 (or 1506802 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 3828730521 is about 61876.7365089660. The cubic root of 3828730521 is about 1564.4136624305.

The spelling of 3828730521 in words is "three billion, eight hundred twenty-eight million, seven hundred thirty thousand, five hundred twenty-one".