1338947378 has 4 divisors (see below), whose sum is σ = 2008421070. Its totient is φ = 669473688.

The previous prime is 1338947341. The next prime is 1338947419. The reversal of 1338947378 is 8737498331.

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

It can be written as a sum of positive squares in only one way, i.e., 1062955609 + 275991769 = 32603^2 + 16613^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334736843 + ... + 334736846.

Almost surely, 2^1338947378 is an apocalyptic number.

1338947378 is a deficient number, since it is larger than the sum of its proper divisors (669473692).

1338947378 is an equidigital number, since it uses as much as digits as its factorization.

1338947378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669473691.

The product of its digits is 3048192, while the sum is 53.

The square root of 1338947378 is about 36591.6298899079. The cubic root of 1338947378 is about 1102.1850171840.

The spelling of 1338947378 in words is "one billion, three hundred thirty-eight million, nine hundred forty-seven thousand, three hundred seventy-eight".