398426493 has 16 divisors (see below), whose sum is σ = 564796800. Its totient is φ = 249273024.

The previous prime is 398426453. The next prime is 398426503. The reversal of 398426493 is 394624893.

It is not a de Polignac number, because 398426493 - 2¹² = 398422397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398426423) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 50818 + ... + 58131.

It is an arithmetic number, because the mean of its divisors is an integer number (35299800).

Almost surely, 2^398426493 is an apocalyptic number.

It is an amenable number.

398426493 is a deficient number, since it is larger than the sum of its proper divisors (166370307).

398426493 is a wasteful number, since it uses less digits than its factorization.

398426493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109028.

The product of its digits is 1119744, while the sum is 48.

The square root of 398426493 is about 19960.6235624041. The cubic root of 398426493 is about 735.8388885349.

The spelling of 398426493 in words is "three hundred ninety-eight million, four hundred twenty-six thousand, four hundred ninety-three".