57806491 has 4 divisors (see below), whose sum is σ = 59150872. Its totient is φ = 56462112.

The previous prime is 57806459. The next prime is 57806509. The reversal of 57806491 is 19460875.

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

It is a cyclic number.

It is not a de Polignac number, because 57806491 - 2⁵ = 57806459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57809491) 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, 672126 + ... + 672211.

It is an arithmetic number, because the mean of its divisors is an integer number (14787718).

Almost surely, 2^57806491 is an apocalyptic number.

57806491 is a deficient number, since it is larger than the sum of its proper divisors (1344381).

57806491 is a wasteful number, since it uses less digits than its factorization.

57806491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344380.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 57806491 is about 7603.0580031984. The cubic root of 57806491 is about 386.6566962187.

The spelling of 57806491 in words is "fifty-seven million, eight hundred six thousand, four hundred ninety-one".