500861000 has 32 divisors (see below), whose sum is σ = 1172017080. Its totient is φ = 200344000.

The previous prime is 500860981. The next prime is 500861029. The reversal of 500861000 is 168005.

It can be written as a sum of positive squares in 4 ways, for example, as 28494244 + 472366756 = 5338^2 + 21734^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249431 + ... + 251430.

Almost surely, 2^500861000 is an apocalyptic number.

500861000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

500861000 is an abundant number, since it is smaller than the sum of its proper divisors (671156080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

500861000 is a wasteful number, since it uses less digits than its factorization.

500861000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500882 (or 500868 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 500861000 is about 22379.9240391919. The cubic root of 500861000 is about 794.1558488306.

The spelling of 500861000 in words is "five hundred million, eight hundred sixty-one thousand".