1226808578 has 6 divisors (see below), whose sum is σ = 1840287171. Its totient is φ = 613379522.

The previous prime is 1226808577. The next prime is 1226808613. The reversal of 1226808578 is 8758086221.

It can be written as a sum of positive squares in only one way, i.e., 613404289 + 613404289 = 24767^2 + 24767^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=24767.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226808571) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 37151 + ... + 61917.

Almost surely, 2^1226808578 is an apocalyptic number.

1226808578 is a deficient number, since it is larger than the sum of its proper divisors (613478593).

1226808578 is an frugal number, since it uses more digits than its factorization.

1226808578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49536 (or 24769 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 47.

The square root of 1226808578 is about 35025.8272992944. The cubic root of 1226808578 is about 1070.5137946466.

The spelling of 1226808578 in words is "one billion, two hundred twenty-six million, eight hundred eight thousand, five hundred seventy-eight".