1228919435 has 4 divisors (see below), whose sum is σ = 1474703328. Its totient is φ = 983135544.

The previous prime is 1228919413. The next prime is 1228919459. The reversal of 1228919435 is 5349198221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5349198221 = 163 ⋅32817167.

It is a cyclic number.

It is not a de Polignac number, because 1228919435 - 2²⁴ = 1212142219 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122891939 + ... + 122891948.

It is an arithmetic number, because the mean of its divisors is an integer number (368675832).

Almost surely, 2^1228919435 is an apocalyptic number.

1228919435 is a deficient number, since it is larger than the sum of its proper divisors (245783893).

1228919435 is an equidigital number, since it uses as much as digits as its factorization.

1228919435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245783892.

The product of its digits is 155520, while the sum is 44.

The square root of 1228919435 is about 35055.9472129908. The cubic root of 1228919435 is about 1071.1274211445.

The spelling of 1228919435 in words is "one billion, two hundred twenty-eight million, nine hundred nineteen thousand, four hundred thirty-five".