328428407 has 4 divisors (see below), whose sum is σ = 328464960. Its totient is φ = 328391856.

The previous prime is 328428403. The next prime is 328428437. The reversal of 328428407 is 704824823.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 328428407 - 2² = 328428403 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 (328428403) 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, 5594 + ... + 26232.

It is an arithmetic number, because the mean of its divisors is an integer number (82116240).

Almost surely, 2^328428407 is an apocalyptic number.

328428407 is a deficient number, since it is larger than the sum of its proper divisors (36553).

328428407 is a wasteful number, since it uses less digits than its factorization.

328428407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36552.

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 328428407 is about 18122.5938264918. The cubic root of 328428407 is about 689.9435695642.

The spelling of 328428407 in words is "three hundred twenty-eight million, four hundred twenty-eight thousand, four hundred seven".