398830792778 has 16 divisors (see below), whose sum is σ = 652818852000. Its totient is φ = 181234878000.

The previous prime is 398830792777. The next prime is 398830792823. The reversal of 398830792778 is 877297038893.

It is not an unprimeable number, because it can be changed into a prime (398830792777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2513573 + ... + 2667528.

It is an arithmetic number, because the mean of its divisors is an integer number (40801178250).

Almost surely, 2^398830792778 is an apocalyptic number.

398830792778 is a deficient number, since it is larger than the sum of its proper divisors (253988059222).

398830792778 is a wasteful number, since it uses less digits than its factorization.

398830792778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5184613.

The product of its (nonzero) digits is 256048128, while the sum is 71.

The spelling of 398830792778 in words is "three hundred ninety-eight billion, eight hundred thirty million, seven hundred ninety-two thousand, seven hundred seventy-eight".