398126439 has 12 divisors (see below), whose sum is σ = 577480800. Its totient is φ = 264305664.

The previous prime is 398126429. The next prime is 398126467. The reversal of 398126439 is 934621893.

It is a happy number.

398126439 is a `hidden beast` number, since 3 + 98 + 126 + 439 = 666.

It is not a de Polignac number, because 398126439 - 2¹⁵ = 398093671 is a prime.

It is a super-2 number, since 2×398126439² = 317009322861641442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 398126394 and 398126403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398126419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90394 + ... + 94695.

It is an arithmetic number, because the mean of its divisors is an integer number (48123400).

Almost surely, 2^398126439 is an apocalyptic number.

398126439 is a deficient number, since it is larger than the sum of its proper divisors (179354361).

398126439 is a wasteful number, since it uses less digits than its factorization.

398126439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185334 (or 185331 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 398126439 is about 19953.1059988163. The cubic root of 398126439 is about 735.6541226665.

The spelling of 398126439 in words is "three hundred ninety-eight million, one hundred twenty-six thousand, four hundred thirty-nine".