1329478378 has 16 divisors (see below), whose sum is σ = 2106881280. Its totient is φ = 628160176.

The previous prime is 1329478373. The next prime is 1329478433. The reversal of 1329478378 is 8738749231.

It is not an unprimeable number, because it can be changed into a prime (1329478373) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 241126 + ... + 246577.

It is an arithmetic number, because the mean of its divisors is an integer number (131680080).

Almost surely, 2^1329478378 is an apocalyptic number.

1329478378 is a deficient number, since it is larger than the sum of its proper divisors (777402902).

1329478378 is a wasteful number, since it uses less digits than its factorization.

1329478378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487781.

The product of its digits is 2032128, while the sum is 52.

The square root of 1329478378 is about 36462.0128078525. The cubic root of 1329478378 is about 1099.5806605464.

The spelling of 1329478378 in words is "one billion, three hundred twenty-nine million, four hundred seventy-eight thousand, three hundred seventy-eight".