328031640 has 128 divisors (see below), whose sum is σ = 1123128000. Its totient is φ = 85100544.

The previous prime is 328031633. The next prime is 328031653. The reversal of 328031640 is 46130823.

It is a happy number.

328031640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35856 + ... + 44064.

Almost surely, 2^328031640 is an apocalyptic number.

328031640 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 328031640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (561564000).

328031640 is an abundant number, since it is smaller than the sum of its proper divisors (795096360).

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

328031640 is a wasteful number, since it uses less digits than its factorization.

328031640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8266 (or 8256 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 328031640 is about 18111.6437685816. The cubic root of 328031640 is about 689.6656224842.

It can be divided in two parts, 32803 and 1640, that added together give a palindrome (34443).

The spelling of 328031640 in words is "three hundred twenty-eight million, thirty-one thousand, six hundred forty".