328544628 has 12 divisors (see below), whose sum is σ = 766604160. Its totient is φ = 109514872.

The previous prime is 328544621. The next prime is 328544633. The reversal of 328544628 is 826445823.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 328544628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328544621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13689348 + ... + 13689371.

It is an arithmetic number, because the mean of its divisors is an integer number (63883680).

Almost surely, 2^328544628 is an apocalyptic number.

It is an amenable number.

328544628 is an abundant number, since it is smaller than the sum of its proper divisors (438059532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

328544628 is a wasteful number, since it uses less digits than its factorization.

328544628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27378726 (or 27378724 counting only the distinct ones).

The product of its digits is 368640, while the sum is 42.

The square root of 328544628 is about 18125.8000651006. The cubic root of 328544628 is about 690.0249434377.

The spelling of 328544628 in words is "three hundred twenty-eight million, five hundred forty-four thousand, six hundred twenty-eight".