5778809 has 4 divisors (see below), whose sum is σ = 5784180. Its totient is φ = 5773440.

The previous prime is 5778779. The next prime is 5778821. The reversal of 5778809 is 9088775.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2393209 + 3385600 = 1547^2 + 1840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5778809 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 5778809.

It is not an unprimeable number, because it can be changed into a prime (5718809) 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, 452 + ... + 3429.

It is an arithmetic number, because the mean of its divisors is an integer number (1446045).

Almost surely, 2^5778809 is an apocalyptic number.

It is an amenable number.

5778809 is a deficient number, since it is larger than the sum of its proper divisors (5371).

5778809 is a wasteful number, since it uses less digits than its factorization.

5778809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5370.

The product of its (nonzero) digits is 141120, while the sum is 44.

The square root of 5778809 is about 2403.9153479272. The cubic root of 5778809 is about 179.4510953226.

The spelling of 5778809 in words is "five million, seven hundred seventy-eight thousand, eight hundred nine".