57408689 has 4 divisors (see below), whose sum is σ = 61824756. Its totient is φ = 52992624.

The previous prime is 57408653. The next prime is 57408727. The reversal of 57408689 is 98680475.

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 31449664 + 25959025 = 5608^2 + 5095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57408689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57408619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2208014 + ... + 2208039.

It is an arithmetic number, because the mean of its divisors is an integer number (15456189).

Almost surely, 2^57408689 is an apocalyptic number.

It is an amenable number.

57408689 is a deficient number, since it is larger than the sum of its proper divisors (4416067).

57408689 is a wasteful number, since it uses less digits than its factorization.

57408689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4416066.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 57408689 is about 7576.8521827999. The cubic root of 57408689 is about 385.7677130708.

The spelling of 57408689 in words is "fifty-seven million, four hundred eight thousand, six hundred eighty-nine".