398826084021 has 16 divisors (see below), whose sum is σ = 532521521280. Its totient is φ = 265507583040.

The previous prime is 398826083993. The next prime is 398826084037. The reversal of 398826084021 is 120480628893.

It is not a de Polignac number, because 398826084021 - 2⁵ = 398826083989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398826004021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7290256 + ... + 7344758.

It is an arithmetic number, because the mean of its divisors is an integer number (33282595080).

Almost surely, 2^398826084021 is an apocalyptic number.

It is an amenable number.

398826084021 is a deficient number, since it is larger than the sum of its proper divisors (133695437259).

398826084021 is a wasteful number, since it uses less digits than its factorization.

398826084021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57916.

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 398826084021 in words is "three hundred ninety-eight billion, eight hundred twenty-six million, eighty-four thousand, twenty-one".