398507 has 8 divisors (see below), whose sum is σ = 415584. Its totient is φ = 381888.

The previous prime is 398491. The next prime is 398509. The reversal of 398507 is 705893.

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

It is a cyclic number.

It is not a de Polignac number, because 398507 - 2⁴ = 398491 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398507.

It is not an unprimeable number, because it can be changed into a prime (398509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3818 + ... + 3920.

It is an arithmetic number, because the mean of its divisors is an integer number (51948).

2³⁹⁸⁵⁰⁷ is an apocalyptic number.

398507 is a deficient number, since it is larger than the sum of its proper divisors (17077).

398507 is a wasteful number, since it uses less digits than its factorization.

398507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 398507 is about 631.2741084505. The cubic root of 398507 is about 73.5888446979.

The spelling of 398507 in words is "three hundred ninety-eight thousand, five hundred seven".