398566158 has 16 divisors (see below), whose sum is σ = 797667456. Its totient is φ = 132766200.

The previous prime is 398566153. The next prime is 398566177. The reversal of 398566158 is 851665893.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 398566158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398566153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12268 + ... + 30783.

It is an arithmetic number, because the mean of its divisors is an integer number (49854216).

Almost surely, 2^398566158 is an apocalyptic number.

398566158 is an abundant number, since it is smaller than the sum of its proper divisors (399101298).

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

398566158 is a wasteful number, since it uses less digits than its factorization.

398566158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44599.

The product of its digits is 1555200, while the sum is 51.

The square root of 398566158 is about 19964.1217688132. The cubic root of 398566158 is about 735.9248591668.

The spelling of 398566158 in words is "three hundred ninety-eight million, five hundred sixty-six thousand, one hundred fifty-eight".