505799990 has 16 divisors (see below), whose sum is σ = 935047152. Its totient is φ = 196851744.

The previous prime is 505799989. The next prime is 505799993. The reversal of 505799990 is 99997505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505799993) 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, 683144 + ... + 683883.

It is an arithmetic number, because the mean of its divisors is an integer number (58440447).

Almost surely, 2^505799990 is an apocalyptic number.

505799990 is a deficient number, since it is larger than the sum of its proper divisors (429247162).

505799990 is a wasteful number, since it uses less digits than its factorization.

505799990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367071.

The product of its (nonzero) digits is 1148175, while the sum is 53.

The square root of 505799990 is about 22489.9975544685. The cubic root of 505799990 is about 796.7577052836.

The spelling of 505799990 in words is "five hundred five million, seven hundred ninety-nine thousand, nine hundred ninety".