398420559 has 16 divisors (see below), whose sum is σ = 615916800. Its totient is φ = 254064888.

The previous prime is 398420543. The next prime is 398420567. The reversal of 398420559 is 955024893.

398420559 is a `hidden beast` number, since 3 + 98 + 4 + 2 + 0 + 559 = 666.

It is not a de Polignac number, because 398420559 - 2⁴ = 398420543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398420509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320169 + ... + 321410.

It is an arithmetic number, because the mean of its divisors is an integer number (38494800).

Almost surely, 2^398420559 is an apocalyptic number.

398420559 is a deficient number, since it is larger than the sum of its proper divisors (217496241).

398420559 is a wasteful number, since it uses less digits than its factorization.

398420559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641611 (or 641605 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 398420559 is about 19960.4749191997. The cubic root of 398420559 is about 735.8352354230.

The spelling of 398420559 in words is "three hundred ninety-eight million, four hundred twenty thousand, five hundred fifty-nine".