329278381 has 8 divisors (see below), whose sum is σ = 337446144. Its totient is φ = 321159120.

The previous prime is 329278337. The next prime is 329278451. The reversal of 329278381 is 183872923.

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 329278381 - 2²⁷ = 195060653 is a prime.

It is a super-2 number, since 2×329278381² = 216848504387962322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329278681) 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, 1816 + ... + 25726.

It is an arithmetic number, because the mean of its divisors is an integer number (42180768).

Almost surely, 2^329278381 is an apocalyptic number.

It is an amenable number.

329278381 is a deficient number, since it is larger than the sum of its proper divisors (8167763).

329278381 is a wasteful number, since it uses less digits than its factorization.

329278381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24251.

The product of its digits is 145152, while the sum is 43.

The square root of 329278381 is about 18146.0293452865. The cubic root of 329278381 is about 690.5382490654.

The spelling of 329278381 in words is "three hundred twenty-nine million, two hundred seventy-eight thousand, three hundred eighty-one".