328939647 has 32 divisors (see below), whose sum is σ = 495129600. Its totient is φ = 193010688.

The previous prime is 328939643. The next prime is 328939687. The reversal of 328939647 is 746939823.

It is not a de Polignac number, because 328939647 - 2² = 328939643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 328939647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328939643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74403 + ... + 78699.

It is an arithmetic number, because the mean of its divisors is an integer number (15472800).

Almost surely, 2^328939647 is an apocalyptic number.

328939647 is a deficient number, since it is larger than the sum of its proper divisors (166189953).

328939647 is a wasteful number, since it uses less digits than its factorization.

328939647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4415.

The product of its digits is 1959552, while the sum is 51.

The square root of 328939647 is about 18136.6933866127. The cubic root of 328939647 is about 690.3013785315.

The spelling of 328939647 in words is "three hundred twenty-eight million, nine hundred thirty-nine thousand, six hundred forty-seven".