328353993 has 32 divisors (see below), whose sum is σ = 537264000. Its totient is φ = 198987840.

The previous prime is 328353983. The next prime is 328354007. The reversal of 328353993 is 399353823.

It is a happy number.

328353993 is a `hidden beast` number, since 3 + 28 + 3 + 539 + 93 = 666.

It is not a de Polignac number, because 328353993 - 2¹² = 328349897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (328353973) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17233 + ... + 30881.

It is an arithmetic number, because the mean of its divisors is an integer number (16789500).

Almost surely, 2^328353993 is an apocalyptic number.

328353993 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

328353993 is a deficient number, since it is larger than the sum of its proper divisors (208910007).

328353993 is an equidigital number, since it uses as much as digits as its factorization.

328353993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13681 (or 13663 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The square root of 328353993 is about 18120.5406376300. The cubic root of 328353993 is about 689.8914574064.

The spelling of 328353993 in words is "three hundred twenty-eight million, three hundred fifty-three thousand, nine hundred ninety-three".