398020959 has 40 divisors (see below), whose sum is σ = 689154048. Its totient is φ = 224214480.

The previous prime is 398020933. The next prime is 398020981. The reversal of 398020959 is 959020893.

398020959 is a `hidden beast` number, since 398 + 0 + 209 + 59 = 666.

It is not a de Polignac number, because 398020959 - 2⁸ = 398020703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398020559) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 35314 + ... + 45200.

Almost surely, 2^398020959 is an apocalyptic number.

398020959 is a deficient number, since it is larger than the sum of its proper divisors (291133089).

398020959 is an equidigital number, since it uses as much as digits as its factorization.

398020959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9977 (or 9968 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 398020959 is about 19950.4626262150. The cubic root of 398020959 is about 735.5891486255.

The spelling of 398020959 in words is "three hundred ninety-eight million, twenty thousand, nine hundred fifty-nine".