57720801 has 4 divisors (see below), whose sum is σ = 76961072. Its totient is φ = 38480532.

The previous prime is 57720779. The next prime is 57720809. The reversal of 57720801 is 10802775.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 57720801 - 2⁵ = 57720769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57720809) 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, 9620131 + ... + 9620136.

It is an arithmetic number, because the mean of its divisors is an integer number (19240268).

Almost surely, 2^57720801 is an apocalyptic number.

It is an amenable number.

57720801 is a deficient number, since it is larger than the sum of its proper divisors (19240271).

57720801 is a wasteful number, since it uses less digits than its factorization.

57720801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19240270.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 57720801 is about 7597.4206807311. The cubic root of 57720801 is about 386.4655469971.

The spelling of 57720801 in words is "fifty-seven million, seven hundred twenty thousand, eight hundred one".