398312894 has 32 divisors (see below), whose sum is σ = 700047360. Its totient is φ = 166447008.

The previous prime is 398312891. The next prime is 398312927. The reversal of 398312894 is 498213893.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398312891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103004 + ... + 106800.

It is an arithmetic number, because the mean of its divisors is an integer number (21876480).

Almost surely, 2^398312894 is an apocalyptic number.

398312894 is a deficient number, since it is larger than the sum of its proper divisors (301734466).

398312894 is a wasteful number, since it uses less digits than its factorization.

398312894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3992.

The product of its digits is 373248, while the sum is 47.

The square root of 398312894 is about 19957.7777821079. Note that the first 4 decimals coincide. The cubic root of 398312894 is about 735.7689479820.

Subtracting 398312894 from its reverse (498213893), we obtain a palindrome (99900999).

The spelling of 398312894 in words is "three hundred ninety-eight million, three hundred twelve thousand, eight hundred ninety-four".