398136290 has 16 divisors (see below), whose sum is σ = 722989368. Its totient is φ = 157844736.

The previous prime is 398136289. The next prime is 398136329. The reversal of 398136290 is 92631893.

It can be written as a sum of positive squares in 4 ways, for example, as 126315121 + 271821169 = 11239^2 + 16487^2 .

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 7 ways as a sum of consecutive naturals, for example, 175037 + ... + 177296.

Almost surely, 2^398136290 is an apocalyptic number.

398136290 is a deficient number, since it is larger than the sum of its proper divisors (324853078).

398136290 is a wasteful number, since it uses less digits than its factorization.

398136290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352453.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 398136290 is about 19953.3528510875. The cubic root of 398136290 is about 735.6601901435.

The spelling of 398136290 in words is "three hundred ninety-eight million, one hundred thirty-six thousand, two hundred ninety".