398170128 has 20 divisors (see below), whose sum is σ = 1028606288. Its totient is φ = 132723360.

The previous prime is 398170127. The next prime is 398170139. The reversal of 398170128 is 821071893.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (398170127) 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, 4147558 + ... + 4147653.

Almost surely, 2^398170128 is an apocalyptic number.

It is an amenable number.

398170128 is an abundant number, since it is smaller than the sum of its proper divisors (630436160).

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

398170128 is a wasteful number, since it uses less digits than its factorization.

398170128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8295222 (or 8295216 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 398170128 is about 19954.2007607421. The cubic root of 398170128 is about 735.6810310506.

The spelling of 398170128 in words is "three hundred ninety-eight million, one hundred seventy thousand, one hundred twenty-eight".