328406639 has 8 divisors (see below), whose sum is σ = 358412880. Its totient is φ = 298425600.

The previous prime is 328406599. The next prime is 328406641. The reversal of 328406639 is 936604823.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-328406639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 328406596 and 328406605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328426639) 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, 30149 + ... + 39569.

It is an arithmetic number, because the mean of its divisors is an integer number (44801610).

Almost surely, 2^328406639 is an apocalyptic number.

328406639 is a deficient number, since it is larger than the sum of its proper divisors (30006241).

328406639 is a wasteful number, since it uses less digits than its factorization.

328406639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12601.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 328406639 is about 18121.9932402592. The cubic root of 328406639 is about 689.9283262385.

The spelling of 328406639 in words is "three hundred twenty-eight million, four hundred six thousand, six hundred thirty-nine".