398123265 has 32 divisors (see below), whose sum is σ = 648806400. Its totient is φ = 208428480.

The previous prime is 398123251. The next prime is 398123267. The reversal of 398123265 is 562321893.

It is not a de Polignac number, because 398123265 - 2⁷ = 398123137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (398123267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225456 + ... + 227214.

It is an arithmetic number, because the mean of its divisors is an integer number (20275200).

Almost surely, 2^398123265 is an apocalyptic number.

It is an amenable number.

398123265 is a deficient number, since it is larger than the sum of its proper divisors (250683135).

398123265 is a wasteful number, since it uses less digits than its factorization.

398123265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2037.

The product of its digits is 77760, while the sum is 39.

The square root of 398123265 is about 19953.0264621686. The cubic root of 398123265 is about 735.6521676993.

The spelling of 398123265 in words is "three hundred ninety-eight million, one hundred twenty-three thousand, two hundred sixty-five".