398029086 has 128 divisors (see below), whose sum is σ = 1100252160. Its totient is φ = 103856256.

The previous prime is 398029067. The next prime is 398029103. The reversal of 398029086 is 680920893.

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 63 ways as a sum of consecutive naturals, for example, 525420 + ... + 526176.

It is an arithmetic number, because the mean of its divisors is an integer number (8595720).

Almost surely, 2^398029086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398029086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (550126080).

398029086 is an abundant number, since it is smaller than the sum of its proper divisors (702223074).

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

398029086 is a wasteful number, since it uses less digits than its factorization.

398029086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895 (or 889 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 398029086 is about 19950.6663046626. Note that the first 3 decimals coincide. The cubic root of 398029086 is about 735.5941551393.

The spelling of 398029086 in words is "three hundred ninety-eight million, twenty-nine thousand, eighty-six".