328531000 has 64 divisors (see below), whose sum is σ = 878604480. Its totient is φ = 112636800.

The previous prime is 328530997. The next prime is 328531003. The reversal of 328531000 is 135823.

It is an interprime number because it is at equal distance from previous prime (328530997) and next prime (328531003).

It is a super-2 number, since 2×328531000² = 215865235922000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328531003) 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, 16467 + ... + 30466.

It is an arithmetic number, because the mean of its divisors is an integer number (13728195).

Almost surely, 2^328531000 is an apocalyptic number.

It is an amenable number.

328531000 is an abundant number, since it is smaller than the sum of its proper divisors (550073480).

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

328531000 is a wasteful number, since it uses less digits than its factorization.

328531000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46961 (or 46947 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 328531000 is about 18125.4241329686. The cubic root of 328531000 is about 690.0154025827.

Adding to 328531000 its reverse (135823), we get a palindrome (328666823).

The spelling of 328531000 in words is "three hundred twenty-eight million, five hundred thirty-one thousand".