507998 has 4 divisors (see below), whose sum is σ = 762000. Its totient is φ = 253998.

The previous prime is 507979. The next prime is 508009. The reversal of 507998 is 899705.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 507998.

It is an unprimeable number.

507998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126998 + ... + 127001.

It is an arithmetic number, because the mean of its divisors is an integer number (190500).

2⁵⁰⁷⁹⁹⁸ is an apocalyptic number.

507998 is a deficient number, since it is larger than the sum of its proper divisors (254002).

507998 is a wasteful number, since it uses less digits than its factorization.

507998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254001.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 507998 is about 712.7397842130. The cubic root of 507998 is about 79.7910170520.

The spelling of 507998 in words is "five hundred seven thousand, nine hundred ninety-eight".