398408522 has 8 divisors (see below), whose sum is σ = 597697536. Its totient is φ = 199176012.

The previous prime is 398408509. The next prime is 398408531. The reversal of 398408522 is 225804893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 398408522.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19793 + ... + 34475.

It is an arithmetic number, because the mean of its divisors is an integer number (74712192).

Almost surely, 2^398408522 is an apocalyptic number.

398408522 is a deficient number, since it is larger than the sum of its proper divisors (199289014).

398408522 is a wasteful number, since it uses less digits than its factorization.

398408522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28252.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 398408522 is about 19960.1733960404. The cubic root of 398408522 is about 735.8278250474.

The spelling of 398408522 in words is "three hundred ninety-eight million, four hundred eight thousand, five hundred twenty-two".