500840404 has 24 divisors (see below), whose sum is σ = 885171560. Its totient is φ = 247947264.

The previous prime is 500840401. The next prime is 500840423. The reversal of 500840404 is 404048005.

It can be written as a sum of positive squares in 4 ways, for example, as 100040004 + 400800400 = 10002^2 + 20020^2 .

It is a super-2 number, since 2×500840404² = 501682220557766432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500840401) 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, 175372 + ... + 178204.

Almost surely, 2^500840404 is an apocalyptic number.

It is an amenable number.

500840404 is a deficient number, since it is larger than the sum of its proper divisors (384331156).

500840404 is a wasteful number, since it uses less digits than its factorization.

500840404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259 (or 3257 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 500840404 is about 22379.4638899148. The cubic root of 500840404 is about 794.1449631371.

Adding to 500840404 its reverse (404048005), we get a palindrome (904888409).

The spelling of 500840404 in words is "five hundred million, eight hundred forty thousand, four hundred four".