398135930 has 16 divisors (see below), whose sum is σ = 716964264. Its totient is φ = 159183360.

The previous prime is 398135929. The next prime is 398135987. The reversal of 398135930 is 39531893.

It can be written as a sum of positive squares in 4 ways, for example, as 192127321 + 206008609 = 13861^2 + 14353^2 .

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, 18770 + ... + 33890.

Almost surely, 2^398135930 is an apocalyptic number.

398135930 is a deficient number, since it is larger than the sum of its proper divisors (318828334).

398135930 is a wasteful number, since it uses less digits than its factorization.

398135930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17761.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 398135930 is about 19953.3438300451. The cubic root of 398135930 is about 735.6599684122.

The spelling of 398135930 in words is "three hundred ninety-eight million, one hundred thirty-five thousand, nine hundred thirty".