1228230785 has 4 divisors (see below), whose sum is σ = 1473876948. Its totient is φ = 982584624.

The previous prime is 1228230779. The next prime is 1228230793. The reversal of 1228230785 is 5870328221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5870328221 = 13577 ⋅432373.

It can be written as a sum of positive squares in 2 ways, for example, as 728082289 + 500148496 = 26983^2 + 22364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228230785 - 2⁶ = 1228230721 is a prime.

It is a super-2 number, since 2×1228230785² = 3017101722443432450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122823074 + ... + 122823083.

It is an arithmetic number, because the mean of its divisors is an integer number (368469237).

Almost surely, 2^1228230785 is an apocalyptic number.

It is an amenable number.

1228230785 is a deficient number, since it is larger than the sum of its proper divisors (245646163).

1228230785 is an equidigital number, since it uses as much as digits as its factorization.

1228230785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245646162.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 1228230785 is about 35046.1236800876. The cubic root of 1228230785 is about 1070.9273077488.

The spelling of 1228230785 in words is "one billion, two hundred twenty-eight million, two hundred thirty thousand, seven hundred eighty-five".