505421398 has 8 divisors (see below), whose sum is σ = 775763208. Its totient is φ = 246833664.

The previous prime is 505421393. The next prime is 505421429. The reversal of 505421398 is 893124505.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505421393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2938411 + ... + 2938582.

It is an arithmetic number, because the mean of its divisors is an integer number (96970401).

Almost surely, 2^505421398 is an apocalyptic number.

505421398 is a deficient number, since it is larger than the sum of its proper divisors (270341810).

505421398 is a wasteful number, since it uses less digits than its factorization.

505421398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5877038.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 505421398 is about 22481.5790815503. The cubic root of 505421398 is about 796.5588642454.

The spelling of 505421398 in words is "five hundred five million, four hundred twenty-one thousand, three hundred ninety-eight".