398508798 has 16 divisors (see below), whose sum is σ = 843901200. Its totient is φ = 125022336.

The previous prime is 398508797. The next prime is 398508811. The reversal of 398508798 is 897805893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398508797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1953373 + ... + 1953576.

It is an arithmetic number, because the mean of its divisors is an integer number (52743825).

Almost surely, 2^398508798 is an apocalyptic number.

398508798 is an abundant number, since it is smaller than the sum of its proper divisors (445392402).

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

398508798 is a wasteful number, since it uses less digits than its factorization.

398508798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3906971.

The product of its (nonzero) digits is 4354560, while the sum is 57.

The square root of 398508798 is about 19962.6851400306. The cubic root of 398508798 is about 735.8895537148.

The spelling of 398508798 in words is "three hundred ninety-eight million, five hundred eight thousand, seven hundred ninety-eight".