328655520 has 72 divisors (see below), whose sum is σ = 1121541876. Its totient is φ = 87641088.

The previous prime is 328655489. The next prime is 328655531. The reversal of 328655520 is 25556823.

It is a happy number.

328655520 is a `hidden beast` number, since 3 + 2 + 86 + 55 + 520 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 273836304 + 54819216 = 16548^2 + 7404^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112677 + ... + 115556.

Almost surely, 2^328655520 is an apocalyptic number.

328655520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

328655520 is an abundant number, since it is smaller than the sum of its proper divisors (792886356).

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

328655520 is a wasteful number, since it uses less digits than its factorization.

328655520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228254 (or 228243 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 328655520 is about 18128.8587616540. The cubic root of 328655520 is about 690.1025682434.

The spelling of 328655520 in words is "three hundred twenty-eight million, six hundred fifty-five thousand, five hundred twenty".