578779409 has 16 divisors (see below), whose sum is σ = 628866000. Its totient is φ = 529514496.

The previous prime is 578779381. The next prime is 578779423. The reversal of 578779409 is 904977875.

It can be written as a sum of positive squares in 8 ways, for example, as 5895184 + 572884225 = 2428^2 + 23935^2 .

It is a cyclic number.

It is not a de Polignac number, because 578779409 - 2¹⁶ = 578713873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (578779489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1288817 + ... + 1289265.

It is an arithmetic number, because the mean of its divisors is an integer number (39304125).

Almost surely, 2^578779409 is an apocalyptic number.

It is an amenable number.

578779409 is a deficient number, since it is larger than the sum of its proper divisors (50086591).

578779409 is a wasteful number, since it uses less digits than its factorization.

578779409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124.

The product of its (nonzero) digits is 4445280, while the sum is 56.

The square root of 578779409 is about 24057.8346698118. The cubic root of 578779409 is about 833.3696702911.

The spelling of 578779409 in words is "five hundred seventy-eight million, seven hundred seventy-nine thousand, four hundred nine".