1338410821 has 8 divisors (see below), whose sum is σ = 1484021088. Its totient is φ = 1196790000.

The previous prime is 1338410809. The next prime is 1338410837. The reversal of 1338410821 is 1280148331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1338410821 - 2²¹ = 1336313669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338410321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996655 + ... + 997996.

It is an arithmetic number, because the mean of its divisors is an integer number (185502636).

Almost surely, 2^1338410821 is an apocalyptic number.

1338410821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1338410821 is a deficient number, since it is larger than the sum of its proper divisors (145610267).

1338410821 is a wasteful number, since it uses less digits than its factorization.

1338410821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994723.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1338410821 is about 36584.2974648961. The cubic root of 1338410821 is about 1102.0377711435.

The spelling of 1338410821 in words is "one billion, three hundred thirty-eight million, four hundred ten thousand, eight hundred twenty-one".