398830792821 has 16 divisors (see below), whose sum is σ = 560234188800. Its totient is φ = 251680879728.

The previous prime is 398830792777. The next prime is 398830792823. The reversal of 398830792821 is 128297038893.

It is not a de Polignac number, because 398830792821 - 2⁹ = 398830792309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398830792823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2879701 + ... + 3015018.

It is an arithmetic number, because the mean of its divisors is an integer number (35014636800).

Almost surely, 2^398830792821 is an apocalyptic number.

It is an amenable number.

398830792821 is a deficient number, since it is larger than the sum of its proper divisors (161403395979).

398830792821 is a wasteful number, since it uses less digits than its factorization.

398830792821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5895928.

The product of its (nonzero) digits is 10450944, while the sum is 60.

The spelling of 398830792821 in words is "three hundred ninety-eight billion, eight hundred thirty million, seven hundred ninety-two thousand, eight hundred twenty-one".