398039926 has 8 divisors (see below), whose sum is σ = 601014384. Its totient is φ = 197701800.

The previous prime is 398039897. The next prime is 398039927. The reversal of 398039926 is 629930893.

It is a happy number.

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 398039926.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398039927) 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 3 ways as a sum of consecutive naturals, for example, 658705 + ... + 659308.

It is an arithmetic number, because the mean of its divisors is an integer number (75126798).

Almost surely, 2^398039926 is an apocalyptic number.

398039926 is a deficient number, since it is larger than the sum of its proper divisors (202974458).

398039926 is a wasteful number, since it uses less digits than its factorization.

398039926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318166.

The product of its (nonzero) digits is 629856, while the sum is 49.

The square root of 398039926 is about 19950.9379729375. The cubic root of 398039926 is about 735.6008328492.

It can be divided in two parts, 39803 and 9926, that added together give a square (49729 = 223²).

The spelling of 398039926 in words is "three hundred ninety-eight million, thirty-nine thousand, nine hundred twenty-six".