398303985 has 32 divisors (see below), whose sum is σ = 654192000. Its totient is φ = 206862336.

The previous prime is 398303977. The next prime is 398303989. The reversal of 398303985 is 589303893.

It is not a de Polignac number, because 398303985 - 2³ = 398303977 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (398303989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94401 + ... + 98529.

It is an arithmetic number, because the mean of its divisors is an integer number (20443500).

Almost surely, 2^398303985 is an apocalyptic number.

It is an amenable number.

398303985 is a deficient number, since it is larger than the sum of its proper divisors (255888015).

398303985 is a wasteful number, since it uses less digits than its factorization.

398303985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4305.

The product of its (nonzero) digits is 699840, while the sum is 48.

The square root of 398303985 is about 19957.5545846679. The cubic root of 398303985 is about 735.7634623328.

The spelling of 398303985 in words is "three hundred ninety-eight million, three hundred three thousand, nine hundred eighty-five".