320407855 has 8 divisors (see below), whose sum is σ = 388296864. Its totient is φ = 253788000.

The previous prime is 320407837. The next prime is 320407861. The reversal of 320407855 is 558704023.

It is a happy number.

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

It is not a de Polignac number, because 320407855 - 2⁹ = 320407343 is a prime.

It is a super-2 number, since 2×320407855² = 205322387091402050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320407855.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 316731 + ... + 317740.

It is an arithmetic number, because the mean of its divisors is an integer number (48537108).

Almost surely, 2^320407855 is an apocalyptic number.

320407855 is a deficient number, since it is larger than the sum of its proper divisors (67889009).

320407855 is a wasteful number, since it uses less digits than its factorization.

320407855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634577.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 320407855 is about 17899.9400836986. The cubic root of 320407855 is about 684.2808478999.

The spelling of 320407855 in words is "three hundred twenty million, four hundred seven thousand, eight hundred fifty-five".