320399995 has 8 divisors (see below), whose sum is σ = 384743520. Its totient is φ = 256144320.

The previous prime is 320399957. The next prime is 320400001. The reversal of 320399995 is 599993023.

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

It is not a de Polignac number, because 320399995 - 2²¹ = 318302843 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13650 + ... + 28759.

It is an arithmetic number, because the mean of its divisors is an integer number (48092940).

Almost surely, 2^320399995 is an apocalyptic number.

320399995 is a deficient number, since it is larger than the sum of its proper divisors (64343525).

320399995 is a wasteful number, since it uses less digits than its factorization.

320399995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43925.

The product of its (nonzero) digits is 590490, while the sum is 49.

The square root of 320399995 is about 17899.7205285446. The cubic root of 320399995 is about 684.2752524364.

The spelling of 320399995 in words is "three hundred twenty million, three hundred ninety-nine thousand, nine hundred ninety-five".