328817421 has 16 divisors (see below), whose sum is σ = 488404800. Its totient is φ = 218641104.

The previous prime is 328817413. The next prime is 328817429. The reversal of 328817421 is 124718823.

It is an interprime number because it is at equal distance from previous prime (328817413) and next prime (328817429).

It is not a de Polignac number, because 328817421 - 2³ = 328817413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328817429) 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, 5151 + ... + 26156.

It is an arithmetic number, because the mean of its divisors is an integer number (30525300).

Almost surely, 2^328817421 is an apocalyptic number.

It is an amenable number.

328817421 is a deficient number, since it is larger than the sum of its proper divisors (159587379).

328817421 is a wasteful number, since it uses less digits than its factorization.

328817421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31705 (or 31699 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 328817421 is about 18133.3234957081. The cubic root of 328817421 is about 690.2158681859.

The spelling of 328817421 in words is "three hundred twenty-eight million, eight hundred seventeen thousand, four hundred twenty-one".