852721428 has 96 divisors (see below), whose sum is σ = 2286313344. Its totient is φ = 245035008.

The previous prime is 852721427. The next prime is 852721439. The reversal of 852721428 is 824127258.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (852721427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 362151 + ... + 364497.

It is an arithmetic number, because the mean of its divisors is an integer number (23815764).

Almost surely, 2^852721428 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 852721428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1143156672).

852721428 is an abundant number, since it is smaller than the sum of its proper divisors (1433591916).

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

852721428 is a wasteful number, since it uses less digits than its factorization.

852721428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521 (or 2519 counting only the distinct ones).

The product of its digits is 71680, while the sum is 39.

The square root of 852721428 is about 29201.3942817805. The cubic root of 852721428 is about 948.2781101114.

The spelling of 852721428 in words is "eight hundred fifty-two million, seven hundred twenty-one thousand, four hundred twenty-eight".