398026839 has 32 divisors (see below), whose sum is σ = 644474880. Its totient is φ = 213436512.

The previous prime is 398026823. The next prime is 398026847. The reversal of 398026839 is 938620893.

It is not a de Polignac number, because 398026839 - 2⁴ = 398026823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398026859) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 38032 + ... + 47354.

It is an arithmetic number, because the mean of its divisors is an integer number (20139840).

Almost surely, 2^398026839 is an apocalyptic number.

398026839 is a deficient number, since it is larger than the sum of its proper divisors (246448041).

398026839 is a wasteful number, since it uses less digits than its factorization.

398026839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9459.

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 398026839 is about 19950.6099906745. The cubic root of 398026839 is about 735.5927709162.

The spelling of 398026839 in words is "three hundred ninety-eight million, twenty-six thousand, eight hundred thirty-nine".