328523640 has 96 divisors (see below), whose sum is σ = 1047066480. Its totient is φ = 82444288.

The previous prime is 328523639. The next prime is 328523641. The reversal of 328523640 is 46325823.

It is a happy number.

328523640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (328523639) and next prime (328523641).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328523641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29944 + ... + 39416.

Almost surely, 2^328523640 is an apocalyptic number.

328523640 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 328523640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523533240).

328523640 is an abundant number, since it is smaller than the sum of its proper divisors (718542840).

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

328523640 is a wasteful number, since it uses less digits than its factorization.

328523640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9521 (or 9500 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 328523640 is about 18125.2211020997. The cubic root of 328523640 is about 690.0102497952.

The spelling of 328523640 in words is "three hundred twenty-eight million, five hundred twenty-three thousand, six hundred forty".