398111794 has 4 divisors (see below), whose sum is σ = 597167694. Its totient is φ = 199055896.

The previous prime is 398111783. The next prime is 398111837. The reversal of 398111794 is 497111893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 497111893 = 809 ⋅614477.

It can be written as a sum of positive squares in only one way, i.e., 374229025 + 23882769 = 19345^2 + 4887^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 398111794.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99527947 + ... + 99527950.

Almost surely, 2^398111794 is an apocalyptic number.

398111794 is a deficient number, since it is larger than the sum of its proper divisors (199055900).

398111794 is a wasteful number, since it uses less digits than its factorization.

398111794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199055899.

The product of its digits is 54432, while the sum is 43.

The square root of 398111794 is about 19952.7390099705. The cubic root of 398111794 is about 735.6451022602.

Subtracting 398111794 from its reverse (497111893), we obtain a palindrome (99000099).

The spelling of 398111794 in words is "three hundred ninety-eight million, one hundred eleven thousand, seven hundred ninety-four".