320428361 has 4 divisors (see below), whose sum is σ = 349558224. Its totient is φ = 291298500.

The previous prime is 320428327. The next prime is 320428373. The reversal of 320428361 is 163824023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 320428361 - 2¹⁰ = 320427337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320428861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14564915 + ... + 14564936.

It is an arithmetic number, because the mean of its divisors is an integer number (87389556).

Almost surely, 2^320428361 is an apocalyptic number.

It is an amenable number.

320428361 is a deficient number, since it is larger than the sum of its proper divisors (29129863).

320428361 is a wasteful number, since it uses less digits than its factorization.

320428361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29129862.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 320428361 is about 17900.5128697476. The cubic root of 320428361 is about 684.2954455068.

The spelling of 320428361 in words is "three hundred twenty million, four hundred twenty-eight thousand, three hundred sixty-one".