320386438 has 16 divisors (see below), whose sum is σ = 486471744. Its totient is φ = 158240680.

The previous prime is 320386399. The next prime is 320386463. The reversal of 320386438 is 834683023.

It is a junction number, because it is equal to n+sod(n) for n = 320386397 and 320386406.

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, 56781 + ... + 62167.

It is an arithmetic number, because the mean of its divisors is an integer number (30404484).

Almost surely, 2^320386438 is an apocalyptic number.

320386438 is a deficient number, since it is larger than the sum of its proper divisors (166085306).

320386438 is a wasteful number, since it uses less digits than its factorization.

320386438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5747.

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 320386438 is about 17899.3418314753. The cubic root of 320386438 is about 684.2656011145.

The spelling of 320386438 in words is "three hundred twenty million, three hundred eighty-six thousand, four hundred thirty-eight".