57544578 has 144 divisors (see below), whose sum is σ = 165372480. Its totient is φ = 14043456.

The previous prime is 57544561. The next prime is 57544579. The reversal of 57544578 is 87544575.

57544578 is a `hidden beast` number, since 5 + 75 + 4 + 4 + 578 = 666.

57544578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×57544578² = 6622756914396168, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57544579) 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 71 ways as a sum of consecutive naturals, for example, 1338225 + ... + 1338267.

It is an arithmetic number, because the mean of its divisors is an integer number (1148420).

Almost surely, 2^57544578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57544578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82686240).

57544578 is an abundant number, since it is smaller than the sum of its proper divisors (107827902).

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

57544578 is a wasteful number, since it uses less digits than its factorization.

57544578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 87 counting only the distinct ones).

The product of its digits is 784000, while the sum is 45.

The square root of 57544578 is about 7585.8142608424. The cubic root of 57544578 is about 386.0718498518.

The spelling of 57544578 in words is "fifty-seven million, five hundred forty-four thousand, five hundred seventy-eight".