328257840 has 80 divisors (see below), whose sum is σ = 1061860608. Its totient is φ = 83728128.

The previous prime is 328257803. The next prime is 328257841. The reversal of 328257840 is 48752823.

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 (328257841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24214 + ... + 35253.

Almost surely, 2^328257840 is an apocalyptic number.

328257840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

328257840 is an abundant number, since it is smaller than the sum of its proper divisors (733602768).

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

328257840 is a wasteful number, since it uses less digits than its factorization.

328257840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59506 (or 59500 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 328257840 is about 18117.8872940528. The cubic root of 328257840 is about 689.8241097564.

The spelling of 328257840 in words is "three hundred twenty-eight million, two hundred fifty-seven thousand, eight hundred forty".