398635990670 has 16 divisors (see below), whose sum is σ = 717585211728. Its totient is φ = 159445412160.

The previous prime is 398635990661. The next prime is 398635990673. The reversal of 398635990670 is 76099536893.

It is a junction number, because it is equal to n+sod(n) for n = 398635990597 and 398635990606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398635990673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935159 + ... + 1292978.

It is an arithmetic number, because the mean of its divisors is an integer number (44849075733).

Almost surely, 2^398635990670 is an apocalyptic number.

398635990670 is a deficient number, since it is larger than the sum of its proper divisors (318949221058).

398635990670 is a wasteful number, since it uses less digits than its factorization.

398635990670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246035.

The product of its (nonzero) digits is 66134880, while the sum is 65.

The spelling of 398635990670 in words is "three hundred ninety-eight billion, six hundred thirty-five million, nine hundred ninety thousand, six hundred seventy".