328378621 has 8 divisors (see below), whose sum is σ = 333367488. Its totient is φ = 323400000.

The previous prime is 328378607. The next prime is 328378639. The reversal of 328378621 is 126873823.

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 328378621 - 2⁹ = 328378109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328378321) 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, 83346 + ... + 87196.

It is an arithmetic number, because the mean of its divisors is an integer number (41670936).

Almost surely, 2^328378621 is an apocalyptic number.

It is an amenable number.

328378621 is a deficient number, since it is larger than the sum of its proper divisors (4988867).

328378621 is a wasteful number, since it uses less digits than its factorization.

328378621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123.

The product of its digits is 96768, while the sum is 40.

The square root of 328378621 is about 18121.2201851862. The cubic root of 328378621 is about 689.9087052775.

The spelling of 328378621 in words is "three hundred twenty-eight million, three hundred seventy-eight thousand, six hundred twenty-one".