57790809 has 6 divisors (see below), whose sum is σ = 83475626. Its totient is φ = 38527200.

The previous prime is 57790801. The next prime is 57790813. The reversal of 57790809 is 90809775.

It can be written as a sum of positive squares in only one way, i.e., 57335184 + 455625 = 7572^2 + 675^2 .

It is not a de Polignac number, because 57790809 - 2³ = 57790801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57790801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3210592 + ... + 3210609.

Almost surely, 2^57790809 is an apocalyptic number.

It is an amenable number.

57790809 is a deficient number, since it is larger than the sum of its proper divisors (25684817).

57790809 is a wasteful number, since it uses less digits than its factorization.

57790809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6421207 (or 6421204 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 57790809 is about 7602.0266376802. The cubic root of 57790809 is about 386.6217284114.

The spelling of 57790809 in words is "fifty-seven million, seven hundred ninety thousand, eight hundred nine".