1338221235 has 32 divisors (see below), whose sum is σ = 2312509248. Its totient is φ = 656916480.

The previous prime is 1338221219. The next prime is 1338221257. The reversal of 1338221235 is 5321228331.

It is a happy number.

It is not a de Polignac number, because 1338221235 - 2⁴ = 1338221219 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 59115 + ... + 78555.

It is an arithmetic number, because the mean of its divisors is an integer number (72265914).

Almost surely, 2^1338221235 is an apocalyptic number.

1338221235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1338221235 is a deficient number, since it is larger than the sum of its proper divisors (974288013).

1338221235 is a wasteful number, since it uses less digits than its factorization.

1338221235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19815.

The product of its digits is 8640, while the sum is 30.

The square root of 1338221235 is about 36581.7062887996. The cubic root of 1338221235 is about 1101.9857341069.

Adding to 1338221235 its reverse (5321228331), we get a palindrome (6659449566).

The spelling of 1338221235 in words is "one billion, three hundred thirty-eight million, two hundred twenty-one thousand, two hundred thirty-five".