398061186 has 16 divisors (see below), whose sum is σ = 803564064. Its totient is φ = 131446784.

The previous prime is 398061179. The next prime is 398061187. The reversal of 398061186 is 681160893.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (398061187) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 309375 + ... + 310658.

It is an arithmetic number, because the mean of its divisors is an integer number (50222754).

Almost surely, 2^398061186 is an apocalyptic number.

398061186 is an abundant number, since it is smaller than the sum of its proper divisors (405502878).

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

398061186 is a wasteful number, since it uses less digits than its factorization.

398061186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620145.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 398061186 is about 19951.4707728528. The cubic root of 398061186 is about 735.6139291864.

The spelling of 398061186 in words is "three hundred ninety-eight million, sixty-one thousand, one hundred eighty-six".