398878098155 has 8 divisors (see below), whose sum is σ = 478751371872. Its totient is φ = 319037375808.

The previous prime is 398878098097. The next prime is 398878098187. The reversal of 398878098155 is 551890878893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398878098155 - 2²⁰ = 398877049579 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8110874 + ... + 8159903.

It is an arithmetic number, because the mean of its divisors is an integer number (59843921484).

Almost surely, 2^398878098155 is an apocalyptic number.

398878098155 is a deficient number, since it is larger than the sum of its proper divisors (79873273717).

398878098155 is a wasteful number, since it uses less digits than its factorization.

398878098155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16275685.

The product of its (nonzero) digits is 174182400, while the sum is 71.

The spelling of 398878098155 in words is "three hundred ninety-eight billion, eight hundred seventy-eight million, ninety-eight thousand, one hundred fifty-five".