57821652 has 72 divisors (see below), whose sum is σ = 169915200. Its totient is φ = 16236288.

The previous prime is 57821611. The next prime is 57821653. The reversal of 57821652 is 25612875.

It is a happy number.

57821652 is a `hidden beast` number, since 578 + 21 + 65 + 2 = 666.

57821652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57821653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12924 + ... + 16812.

Almost surely, 2^57821652 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 57821652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84957600).

57821652 is an abundant number, since it is smaller than the sum of its proper divisors (112093548).

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

57821652 is a wasteful number, since it uses less digits than its factorization.

57821652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3965 (or 3960 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 57821652 is about 7604.0549708692. The cubic root of 57821652 is about 386.6904962854.

The spelling of 57821652 in words is "fifty-seven million, eight hundred twenty-one thousand, six hundred fifty-two".