398134908 has 18 divisors (see below), whose sum is σ = 1006396664. Its totient is φ = 132711624.

The previous prime is 398134907. The next prime is 398134931. The reversal of 398134908 is 809431893.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×398134908² = 317022809936336928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398134907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5529616 + ... + 5529687.

Almost surely, 2^398134908 is an apocalyptic number.

It is an amenable number.

398134908 is an abundant number, since it is smaller than the sum of its proper divisors (608261756).

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

398134908 is a wasteful number, since it uses less digits than its factorization.

398134908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11059313 (or 11059308 counting only the distinct ones).

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

The square root of 398134908 is about 19953.3182202861. The cubic root of 398134908 is about 735.6593389412.

The spelling of 398134908 in words is "three hundred ninety-eight million, one hundred thirty-four thousand, nine hundred eight".