57840437 has 4 divisors (see below), whose sum is σ = 58931820. Its totient is φ = 56749056.

The previous prime is 57840401. The next prime is 57840439. The reversal of 57840437 is 73404875.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38427601 + 19412836 = 6199^2 + 4406^2 .

It is a cyclic number.

It is not a de Polignac number, because 57840437 - 2⁶ = 57840373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57840437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57840439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545612 + ... + 545717.

It is an arithmetic number, because the mean of its divisors is an integer number (14732955).

Almost surely, 2^57840437 is an apocalyptic number.

It is an amenable number.

57840437 is a deficient number, since it is larger than the sum of its proper divisors (1091383).

57840437 is a wasteful number, since it uses less digits than its factorization.

57840437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091382.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 57840437 is about 7605.2900667890. The cubic root of 57840437 is about 386.7323675350.

The spelling of 57840437 in words is "fifty-seven million, eight hundred forty thousand, four hundred thirty-seven".