398647042 has 16 divisors (see below), whose sum is σ = 653571072. Its totient is φ = 181546560.

The previous prime is 398647027. The next prime is 398647049. The reversal of 398647042 is 240746893.

It is a self number, because there is not a number n which added to its sum of digits gives 398647042.

It is not an unprimeable number, because it can be changed into a prime (398647049) 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, 188058 + ... + 190165.

It is an arithmetic number, because the mean of its divisors is an integer number (40848192).

Almost surely, 2^398647042 is an apocalyptic number.

398647042 is a deficient number, since it is larger than the sum of its proper divisors (254924030).

398647042 is a wasteful number, since it uses less digits than its factorization.

398647042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378273.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 398647042 is about 19966.1474000369. The cubic root of 398647042 is about 735.9746380379.

The spelling of 398647042 in words is "three hundred ninety-eight million, six hundred forty-seven thousand, forty-two".