328614991 has 8 divisors (see below), whose sum is σ = 334465200. Its totient is φ = 322779840.

The previous prime is 328614989. The next prime is 328615003. The reversal of 328614991 is 199416823.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 328614991 - 2¹ = 328614989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328614931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46020 + ... + 52678.

It is an arithmetic number, because the mean of its divisors is an integer number (41808150).

Almost surely, 2^328614991 is an apocalyptic number.

328614991 is a deficient number, since it is larger than the sum of its proper divisors (5850209).

328614991 is an equidigital number, since it uses as much as digits as its factorization.

328614991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7529.

The product of its digits is 93312, while the sum is 43.

The square root of 328614991 is about 18127.7409237886. The cubic root of 328614991 is about 690.0741998200.

The spelling of 328614991 in words is "three hundred twenty-eight million, six hundred fourteen thousand, nine hundred ninety-one".