320489431 has 8 divisors (see below), whose sum is σ = 322660800. Its totient is φ = 318323712.

The previous prime is 320489419. The next prime is 320489437. The reversal of 320489431 is 134984023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320489431 - 2⁹ = 320488919 is a prime.

It is a super-2 number, since 2×320489431² = 205426950765407522, 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 (320489437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201666 + ... + 203248.

It is an arithmetic number, because the mean of its divisors is an integer number (40332600).

Almost surely, 2^320489431 is an apocalyptic number.

320489431 is a deficient number, since it is larger than the sum of its proper divisors (2171369).

320489431 is a wasteful number, since it uses less digits than its factorization.

320489431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 320489431 is about 17902.2186055248. The cubic root of 320489431 is about 684.3389157208.

The spelling of 320489431 in words is "three hundred twenty million, four hundred eighty-nine thousand, four hundred thirty-one".