389721852 has 144 divisors (see below), whose sum is σ = 1095843840. Its totient is φ = 116049024.

The previous prime is 389721817. The next prime is 389721859. The reversal of 389721852 is 258127983.

It is a happy number.

389721852 is a `hidden beast` number, since 389 + 7 + 218 + 52 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 389721798 and 389721807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389721859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3068613 + ... + 3068739.

Almost surely, 2^389721852 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389721852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547921920).

389721852 is an abundant number, since it is smaller than the sum of its proper divisors (706121988).

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

389721852 is a wasteful number, since it uses less digits than its factorization.

389721852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 307 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 389721852 is about 19741.3741163071. The cubic root of 389721852 is about 730.4406247111.

The spelling of 389721852 in words is "three hundred eighty-nine million, seven hundred twenty-one thousand, eight hundred fifty-two".