398828578 has 16 divisors (see below), whose sum is σ = 619324416. Its totient is φ = 192424320.

The previous prime is 398828567. The next prime is 398828593. The reversal of 398828578 is 875828893.

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, 12775 + ... + 30997.

It is an arithmetic number, because the mean of its divisors is an integer number (38707776).

Almost surely, 2^398828578 is an apocalyptic number.

398828578 is a deficient number, since it is larger than the sum of its proper divisors (220495838).

398828578 is a wasteful number, since it uses less digits than its factorization.

398828578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18609.

The product of its digits is 7741440, while the sum is 58.

The square root of 398828578 is about 19970.6929774607. The cubic root of 398828578 is about 736.0863371957.

The spelling of 398828578 in words is "three hundred ninety-eight million, eight hundred twenty-eight thousand, five hundred seventy-eight".