398929894 has 16 divisors (see below), whose sum is σ = 681177600. Its totient is φ = 173447560.

The previous prime is 398929879. The next prime is 398929897. The reversal of 398929894 is 498929893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398929897) 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 7 ways as a sum of consecutive naturals, for example, 393694 + ... + 394705.

It is an arithmetic number, because the mean of its divisors is an integer number (42573600).

Almost surely, 2^398929894 is an apocalyptic number.

398929894 is a deficient number, since it is larger than the sum of its proper divisors (282247706).

398929894 is a wasteful number, since it uses less digits than its factorization.

398929894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788435.

The product of its digits is 10077696, while the sum is 61.

The square root of 398929894 is about 19973.2294334191. The cubic root of 398929894 is about 736.1486622256.

Subtracting 398929894 from its reverse (498929893), we obtain a palindrome (99999999).

The spelling of 398929894 in words is "three hundred ninety-eight million, nine hundred twenty-nine thousand, eight hundred ninety-four".