57821040 has 100 divisors (see below), whose sum is σ = 200843544. Its totient is φ = 15417216.

The previous prime is 57821017. The next prime is 57821053. The reversal of 57821040 is 4012875.

57821040 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 (27).

It is a junction number, because it is equal to n+sod(n) for n = 57820995 and 57821013.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 2019 + ... + 10941.

Almost surely, 2^57821040 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 57821040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100421772).

57821040 is an abundant number, since it is smaller than the sum of its proper divisors (143022504).

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

57821040 is a wasteful number, since it uses less digits than its factorization.

57821040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8948 (or 8933 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 57821040 is about 7604.0147290757. The cubic root of 57821040 is about 386.6891320016.

The spelling of 57821040 in words is "fifty-seven million, eight hundred twenty-one thousand, forty".