398908647766 has 8 divisors (see below), whose sum is σ = 605937186720. Its totient is φ = 196929585528.

The previous prime is 398908647743. The next prime is 398908647811. The reversal of 398908647766 is 667746809893.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1262368981 + ... + 1262369296.

It is an arithmetic number, because the mean of its divisors is an integer number (75742148340).

Almost surely, 2^398908647766 is an apocalyptic number.

398908647766 is a deficient number, since it is larger than the sum of its proper divisors (207028538954).

398908647766 is a wasteful number, since it uses less digits than its factorization.

398908647766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524738358.

The product of its (nonzero) digits is 658409472, while the sum is 73.

The spelling of 398908647766 in words is "three hundred ninety-eight billion, nine hundred eight million, six hundred forty-seven thousand, seven hundred sixty-six".