398130587 has 4 divisors (see below), whose sum is σ = 402072576. Its totient is φ = 394188600.

The previous prime is 398130581. The next prime is 398130637. The reversal of 398130587 is 785031893.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398130587 - 2⁴ = 398130571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398130581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1970843 + ... + 1971044.

It is an arithmetic number, because the mean of its divisors is an integer number (100518144).

Almost surely, 2^398130587 is an apocalyptic number.

398130587 is a deficient number, since it is larger than the sum of its proper divisors (3941989).

398130587 is a wasteful number, since it uses less digits than its factorization.

398130587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3941988.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 398130587 is about 19953.2099422624. The cubic root of 398130587 is about 735.6566775355.

The spelling of 398130587 in words is "three hundred ninety-eight million, one hundred thirty thousand, five hundred eighty-seven".