320620778 has 8 divisors (see below), whose sum is σ = 481224672. Its totient is φ = 160212556.

The previous prime is 320620757. The next prime is 320620823. The reversal of 320620778 is 877026023.

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

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 3 ways as a sum of consecutive naturals, for example, 44750 + ... + 51417.

It is an arithmetic number, because the mean of its divisors is an integer number (60153084).

Almost surely, 2^320620778 is an apocalyptic number.

320620778 is a deficient number, since it is larger than the sum of its proper divisors (160603894).

320620778 is a wasteful number, since it uses less digits than its factorization.

320620778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97836.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 320620778 is about 17905.8866856685. The cubic root of 320620778 is about 684.4323910726.

The spelling of 320620778 in words is "three hundred twenty million, six hundred twenty thousand, seven hundred seventy-eight".