1338780633 has 4 divisors (see below), whose sum is σ = 1785040848. Its totient is φ = 892520420.

The previous prime is 1338780607. The next prime is 1338780637. The reversal of 1338780633 is 3360878331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1338780633 - 2¹⁶ = 1338715097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1338780637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223130103 + ... + 223130108.

It is an arithmetic number, because the mean of its divisors is an integer number (446260212).

Almost surely, 2^1338780633 is an apocalyptic number.

It is an amenable number.

1338780633 is a deficient number, since it is larger than the sum of its proper divisors (446260215).

1338780633 is an equidigital number, since it uses as much as digits as its factorization.

1338780633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446260214.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 1338780633 is about 36589.3513607443. The cubic root of 1338780633 is about 1102.1392619702.

The spelling of 1338780633 in words is "one billion, three hundred thirty-eight million, seven hundred eighty thousand, six hundred thirty-three".