328773840 has 80 divisors (see below), whose sum is σ = 1038469248. Its totient is φ = 86015488.

The previous prime is 328773827. The next prime is 328773847. The reversal of 328773840 is 48377823.

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

It is a junction number, because it is equal to n+sod(n) for n = 328773792 and 328773801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328773847) 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, 204 + ... + 25643.

Almost surely, 2^328773840 is an apocalyptic number.

328773840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328773840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (519234624).

328773840 is an abundant number, since it is smaller than the sum of its proper divisors (709695408).

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

328773840 is a wasteful number, since it uses less digits than its factorization.

328773840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25916 (or 25910 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 328773840 is about 18132.1217732509. The cubic root of 328773840 is about 690.1853734241.

The spelling of 328773840 in words is "three hundred twenty-eight million, seven hundred seventy-three thousand, eight hundred forty".