398877838 has 8 divisors (see below), whose sum is σ = 598609440. Its totient is φ = 199341360.

The previous prime is 398877833. The next prime is 398877863. The reversal of 398877838 is 838778893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×398877838³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398877833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43558 + ... + 51913.

It is an arithmetic number, because the mean of its divisors is an integer number (74826180).

Almost surely, 2^398877838 is an apocalyptic number.

398877838 is a deficient number, since it is larger than the sum of its proper divisors (199731602).

398877838 is a wasteful number, since it uses less digits than its factorization.

398877838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97562.

The product of its digits is 16257024, while the sum is 61.

The square root of 398877838 is about 19971.9262466093. The cubic root of 398877838 is about 736.1166410424.

The spelling of 398877838 in words is "three hundred ninety-eight million, eight hundred seventy-seven thousand, eight hundred thirty-eight".