328655280 has 80 divisors (see below), whose sum is σ = 1063146240. Its totient is φ = 83829504.

The previous prime is 328655267. The next prime is 328655281. The reversal of 328655280 is 82556823.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (328655281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24250 + ... + 35289.

It is an arithmetic number, because the mean of its divisors is an integer number (13289328).

Almost surely, 2^328655280 is an apocalyptic number.

328655280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

328655280 is an abundant number, since it is smaller than the sum of its proper divisors (734490960).

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

328655280 is a wasteful number, since it uses less digits than its factorization.

328655280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59578 (or 59572 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 328655280 is about 18128.8521423724. The cubic root of 328655280 is about 690.1024002614.

The spelling of 328655280 in words is "three hundred twenty-eight million, six hundred fifty-five thousand, two hundred eighty".