320428838 has 4 divisors (see below), whose sum is σ = 480643260. Its totient is φ = 160214418.

The previous prime is 320428813. The next prime is 320428861. The reversal of 320428838 is 838824023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 838824023 = 229 ⋅3662987.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80107208 + ... + 80107211.

It is an arithmetic number, because the mean of its divisors is an integer number (120160815).

Almost surely, 2^320428838 is an apocalyptic number.

320428838 is a deficient number, since it is larger than the sum of its proper divisors (160214422).

320428838 is a wasteful number, since it uses less digits than its factorization.

320428838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160214421.

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 320428838 is about 17900.5261933833. The cubic root of 320428838 is about 684.2957850614.

The spelling of 320428838 in words is "three hundred twenty million, four hundred twenty-eight thousand, eight hundred thirty-eight".