1338231650 has 48 divisors (see below), whose sum is σ = 2902790400. Its totient is φ = 458816400.

The previous prime is 1338231649. The next prime is 1338231689. The reversal of 1338231650 is 561328331.

It is a Curzon 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 23 ways as a sum of consecutive naturals, for example, 21866 + ... + 56165.

It is an arithmetic number, because the mean of its divisors is an integer number (60474800).

Almost surely, 2^1338231650 is an apocalyptic number.

1338231650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1338231650 is an abundant number, since it is smaller than the sum of its proper divisors (1564558750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1338231650 is an equidigital number, since it uses as much as digits as its factorization.

1338231650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78064 (or 78045 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1338231650 is about 36581.8486410952. The cubic root of 1338231650 is about 1101.9885929147.

Adding to 1338231650 its reverse (561328331), we get a palindrome (1899559981).

The spelling of 1338231650 in words is "one billion, three hundred thirty-eight million, two hundred thirty-one thousand, six hundred fifty".