3828625921 has 4 divisors (see below), whose sum is σ = 3829136832. Its totient is φ = 3828115012.

The previous prime is 3828625883. The next prime is 3828625967. The reversal of 3828625921 is 1295268283.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3828625921 - 2²³ = 3820237313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3828625991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244045 + ... + 259258.

It is an arithmetic number, because the mean of its divisors is an integer number (957284208).

Almost surely, 2^3828625921 is an apocalyptic number.

It is an amenable number.

3828625921 is a deficient number, since it is larger than the sum of its proper divisors (510911).

3828625921 is an equidigital number, since it uses as much as digits as its factorization.

3828625921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510910.

The product of its digits is 414720, while the sum is 46.

The square root of 3828625921 is about 61875.8912743889. The cubic root of 3828625921 is about 1564.3994158321.

The spelling of 3828625921 in words is "three billion, eight hundred twenty-eight million, six hundred twenty-five thousand, nine hundred twenty-one".