398908216 has 24 divisors (see below), whose sum is σ = 870068520. Its totient is φ = 170960496.

The previous prime is 398908201. The next prime is 398908241. The reversal of 398908216 is 612809893.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 508420 + ... + 509203.

It is an arithmetic number, because the mean of its divisors is an integer number (36252855).

Almost surely, 2^398908216 is an apocalyptic number.

It is an amenable number.

398908216 is an abundant number, since it is smaller than the sum of its proper divisors (471160304).

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

398908216 is a wasteful number, since it uses less digits than its factorization.

398908216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017643 (or 1017632 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 398908216 is about 19972.6867496589. The cubic root of 398908216 is about 736.1353277860.

The spelling of 398908216 in words is "three hundred ninety-eight million, nine hundred eight thousand, two hundred sixteen".