1228015835 has 4 divisors (see below), whose sum is σ = 1473619008. Its totient is φ = 982412664.

The previous prime is 1228015823. The next prime is 1228015843. The reversal of 1228015835 is 5385108221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1228015835 - 2⁴ = 1228015819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1228015795 and 1228015804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122801579 + ... + 122801588.

It is an arithmetic number, because the mean of its divisors is an integer number (368404752).

Almost surely, 2^1228015835 is an apocalyptic number.

1228015835 is a deficient number, since it is larger than the sum of its proper divisors (245603173).

1228015835 is an equidigital number, since it uses as much as digits as its factorization.

1228015835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245603172.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 1228015835 is about 35043.0568729385. The cubic root of 1228015835 is about 1070.8648305505.

The spelling of 1228015835 in words is "one billion, two hundred twenty-eight million, fifteen thousand, eight hundred thirty-five".