510440240 has 20 divisors (see below), whose sum is σ = 1186773744. Its totient is φ = 204176064.

The previous prime is 510440233. The next prime is 510440243. The reversal of 510440240 is 42044015.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×510440240² = 521098477222515200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (510440243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3190172 + ... + 3190331.

Almost surely, 2^510440240 is an apocalyptic number.

It is an amenable number.

510440240 is an abundant number, since it is smaller than the sum of its proper divisors (676333504).

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

510440240 is a wasteful number, since it uses less digits than its factorization.

510440240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6380516 (or 6380510 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 510440240 is about 22592.9245561525. The cubic root of 510440240 is about 799.1867986596.

Adding to 510440240 its reverse (42044015), we get a palindrome (552484255).

The spelling of 510440240 in words is "five hundred ten million, four hundred forty thousand, two hundred forty".