328780424 has 64 divisors (see below), whose sum is σ = 732067200. Its totient is φ = 135442944.

The previous prime is 328780399. The next prime is 328780447. The reversal of 328780424 is 424087823.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 719204 + ... + 719660.

It is an arithmetic number, because the mean of its divisors is an integer number (11438550).

Almost surely, 2^328780424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328780424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366033600).

328780424 is an abundant number, since it is smaller than the sum of its proper divisors (403286776).

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

328780424 is a wasteful number, since it uses less digits than its factorization.

328780424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 938 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 328780424 is about 18132.3033285901. The cubic root of 328780424 is about 690.1899805933.

The spelling of 328780424 in words is "three hundred twenty-eight million, seven hundred eighty thousand, four hundred twenty-four".