398990050655 has 12 divisors (see below), whose sum is σ = 556957540440. Its totient is φ = 273593177424.

The previous prime is 398990050651. The next prime is 398990050673. The reversal of 398990050655 is 556050099893.

It is not a de Polignac number, because 398990050655 - 2² = 398990050651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398990050594 and 398990050603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398990050651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 814265165 + ... + 814265654.

It is an arithmetic number, because the mean of its divisors is an integer number (46413128370).

Almost surely, 2^398990050655 is an apocalyptic number.

398990050655 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

398990050655 is a deficient number, since it is larger than the sum of its proper divisors (157967489785).

398990050655 is a wasteful number, since it uses less digits than its factorization.

398990050655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628530838 (or 1628530831 counting only the distinct ones).

The product of its (nonzero) digits is 13122000, while the sum is 59.

The spelling of 398990050655 in words is "three hundred ninety-eight billion, nine hundred ninety million, fifty thousand, six hundred fifty-five".