398111478 has 32 divisors (see below), whose sum is σ = 825327360. Its totient is φ = 127871520.

The previous prime is 398111477. The next prime is 398111513. The reversal of 398111478 is 874111893.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398111471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97351 + ... + 101357.

It is an arithmetic number, because the mean of its divisors is an integer number (25791480).

Almost surely, 2^398111478 is an apocalyptic number.

398111478 is an abundant number, since it is smaller than the sum of its proper divisors (427215882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398111478 is a wasteful number, since it uses less digits than its factorization.

398111478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4612.

The product of its digits is 48384, while the sum is 42.

The square root of 398111478 is about 19952.7310912567. The cubic root of 398111478 is about 735.6449076215.

The spelling of 398111478 in words is "three hundred ninety-eight million, one hundred eleven thousand, four hundred seventy-eight".