500000004 has 108 divisors (see below), whose sum is σ = 1466547264. Its totient is φ = 140698944.

The previous prime is 500000003. The next prime is 500000009. The reversal of 500000004 is 400000005.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500000003) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2993929 + ... + 2994095.

Almost surely, 2^500000004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 500000004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733273632).

500000004 is an abundant number, since it is smaller than the sum of its proper divisors (966547260).

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

500000004 is a wasteful number, since it uses less digits than its factorization.

500000004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 9.

The square root of 500000004 is about 22360.6798644406. The cubic root of 500000004 is about 793.7005281006.

Adding to 500000004 its reverse (400000005), we get a palindrome (900000009).

Subtracting from 500000004 its reverse (400000005), we obtain a palindrome (99999999).

The spelling of 500000004 in words is "five hundred million, four", and thus it is an aban number.