398530945 has 8 divisors (see below), whose sum is σ = 481728744. Its totient is φ = 316497024.

The previous prime is 398530943. The next prime is 398530967. The reversal of 398530945 is 549035893.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 108305649 + 290225296 = 10407^2 + 17036^2 .

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 398530945 - 2¹ = 398530943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398530895 and 398530904.

It is not an unprimeable number, because it can be changed into a prime (398530943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290214 + ... + 291583.

It is an arithmetic number, because the mean of its divisors is an integer number (60216093).

Almost surely, 2^398530945 is an apocalyptic number.

It is an amenable number.

398530945 is a deficient number, since it is larger than the sum of its proper divisors (83197799).

398530945 is a wasteful number, since it uses less digits than its factorization.

398530945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581939.

The product of its (nonzero) digits is 583200, while the sum is 46.

The square root of 398530945 is about 19963.2398422701. The cubic root of 398530945 is about 735.9031857384.

The spelling of 398530945 in words is "three hundred ninety-eight million, five hundred thirty thousand, nine hundred forty-five".