398726249 has 8 divisors (see below), whose sum is σ = 413674560. Its totient is φ = 383857936.

The previous prime is 398726243. The next prime is 398726269. The reversal of 398726249 is 942627893.

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

It is a cyclic number.

It is not a de Polignac number, because 398726249 - 2⁸ = 398725993 is a prime.

It is a super-2 number, since 2×398726249² = 317965243283220002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 398726197 and 398726206.

It is not an unprimeable number, because it can be changed into a prime (398726243) 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 7 ways as a sum of consecutive naturals, for example, 9749 + ... + 29874.

It is an arithmetic number, because the mean of its divisors is an integer number (51709320).

Almost surely, 2^398726249 is an apocalyptic number.

It is an amenable number.

398726249 is a deficient number, since it is larger than the sum of its proper divisors (14948311).

398726249 is a wasteful number, since it uses less digits than its factorization.

398726249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39999.

The product of its digits is 1306368, while the sum is 50.

The square root of 398726249 is about 19968.1308339063. The cubic root of 398726249 is about 736.0233782990.

The spelling of 398726249 in words is "three hundred ninety-eight million, seven hundred twenty-six thousand, two hundred forty-nine".