398600665 has 8 divisors (see below), whose sum is σ = 478536768. Its totient is φ = 318736560.

The previous prime is 398600633. The next prime is 398600687. The reversal of 398600665 is 566006893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 398600665 - 2⁵ = 398600633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4957 + ... + 28666.

It is an arithmetic number, because the mean of its divisors is an integer number (59817096).

Almost surely, 2^398600665 is an apocalyptic number.

It is an amenable number.

398600665 is a deficient number, since it is larger than the sum of its proper divisors (79936103).

398600665 is a wasteful number, since it uses less digits than its factorization.

398600665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35999.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 398600665 is about 19964.9859754521. The cubic root of 398600665 is about 735.9460968173.

The spelling of 398600665 in words is "three hundred ninety-eight million, six hundred thousand, six hundred sixty-five".