328213440 has 84 divisors (see below), whose sum is σ = 1128927384. Its totient is φ = 87522816.

The previous prime is 328213433. The next prime is 328213447. The reversal of 328213440 is 44312823.

328213440 is a `hidden beast` number, since 3 + 2 + 8 + 213 + 440 = 666.

It is an interprime number because it is at equal distance from previous prime (328213433) and next prime (328213447).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328213447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54102 + ... + 59861.

Almost surely, 2^328213440 is an apocalyptic number.

328213440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

328213440 is an abundant number, since it is smaller than the sum of its proper divisors (800713944).

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

328213440 is a wasteful number, since it uses less digits than its factorization.

328213440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113986 (or 113973 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 328213440 is about 18116.6619441883. The cubic root of 328213440 is about 689.7930065932.

The spelling of 328213440 in words is "three hundred twenty-eight million, two hundred thirteen thousand, four hundred forty".