57178420 has 24 divisors (see below), whose sum is σ = 129311784. Its totient is φ = 21111936.

The previous prime is 57178399. The next prime is 57178421. The reversal of 57178420 is 2487175.

It is a happy number.

57178420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6170256 + 51008164 = 2484^2 + 7142^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57178421) 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 7 ways as a sum of consecutive naturals, for example, 109699 + ... + 110218.

It is an arithmetic number, because the mean of its divisors is an integer number (5387991).

Almost surely, 2^57178420 is an apocalyptic number.

It is an amenable number.

57178420 is an abundant number, since it is smaller than the sum of its proper divisors (72133364).

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

57178420 is a wasteful number, since it uses less digits than its factorization.

57178420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219939 (or 219937 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 57178420 is about 7561.6413562136. The cubic root of 57178420 is about 385.2512443386.

The spelling of 57178420 in words is "fifty-seven million, one hundred seventy-eight thousand, four hundred twenty".