57840426 has 64 divisors (see below), whose sum is σ = 155554560. Its totient is φ = 15552000.

The previous prime is 57840401. The next prime is 57840439. The reversal of 57840426 is 62404875.

57840426 is a `hidden beast` number, since 578 + 40 + 42 + 6 = 666.

57840426 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 2×57840426² = 6691029759722952, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 1926 + ... + 10926.

It is an arithmetic number, because the mean of its divisors is an integer number (2430540).

Almost surely, 2^57840426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57840426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77777280).

57840426 is an abundant number, since it is smaller than the sum of its proper divisors (97714134).

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

57840426 is a wasteful number, since it uses less digits than its factorization.

57840426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9036 (or 9030 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 57840426 is about 7605.2893436082. The cubic root of 57840426 is about 386.7323430190.

Subtracting from 57840426 its sum of digits (36), we obtain a triangular number (57840390 = T₁₀₇₅₅).

The spelling of 57840426 in words is "fifty-seven million, eight hundred forty thousand, four hundred twenty-six".