398994603393 has 32 divisors (see below), whose sum is σ = 537550848000. Its totient is φ = 263234664000.

The previous prime is 398994603383. The next prime is 398994603421. The reversal of 398994603393 is 393306499893.

It is not a de Polignac number, because 398994603393 - 2⁴ = 398994603377 is a prime.

It is a super-2 number, since 2×398994603393² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398994603323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209885743 + ... + 209887643.

It is an arithmetic number, because the mean of its divisors is an integer number (16798464000).

Almost surely, 2^398994603393 is an apocalyptic number.

It is an amenable number.

398994603393 is a deficient number, since it is larger than the sum of its proper divisors (138556244607).

398994603393 is a wasteful number, since it uses less digits than its factorization.

398994603393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3813.

The product of its (nonzero) digits is 102036672, while the sum is 66.

The spelling of 398994603393 in words is "three hundred ninety-eight billion, nine hundred ninety-four million, six hundred three thousand, three hundred ninety-three".