398991144895 has 8 divisors (see below), whose sum is σ = 547187855904. Its totient is φ = 273593927904.

The previous prime is 398991144887. The next prime is 398991144943. The reversal of 398991144895 is 598441199893.

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 398991144895 - 2³ = 398991144887 is a prime.

It is a super-2 number, since 2×398991144895² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 5699873464 + ... + 5699873533.

It is an arithmetic number, because the mean of its divisors is an integer number (68398481988).

Almost surely, 2^398991144895 is an apocalyptic number.

398991144895 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

398991144895 is a deficient number, since it is larger than the sum of its proper divisors (148196711009).

398991144895 is a wasteful number, since it uses less digits than its factorization.

398991144895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11399747009.

The product of its digits is 100776960, while the sum is 70.

The spelling of 398991144895 in words is "three hundred ninety-eight billion, nine hundred ninety-one million, one hundred forty-four thousand, eight hundred ninety-five".