328499399 has 4 divisors (see below), whose sum is σ = 331007160. Its totient is φ = 325991640.

The previous prime is 328499389. The next prime is 328499407. The reversal of 328499399 is 993994823.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 328499399 - 2⁴ = 328499383 is a prime.

It is a super-2 number, since 2×328499399² = 215823710286722402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328499389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253684 + ... + 1253945.

It is an arithmetic number, because the mean of its divisors is an integer number (82751790).

Almost surely, 2^328499399 is an apocalyptic number.

328499399 is a deficient number, since it is larger than the sum of its proper divisors (2507761).

328499399 is a wasteful number, since it uses less digits than its factorization.

328499399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507760.

The product of its digits is 3779136, while the sum is 56.

The square root of 328499399 is about 18124.5523806796. The cubic root of 328499399 is about 689.9932779573.

The spelling of 328499399 in words is "three hundred twenty-eight million, four hundred ninety-nine thousand, three hundred ninety-nine".