509840450 has 24 divisors (see below), whose sum is σ = 1083775872. Its totient is φ = 174802320.

The previous prime is 509840449. The next prime is 509840459. The reversal of 509840450 is 54048905.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 509840450.

It is not an unprimeable number, because it can be changed into a prime (509840459) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 727994 + ... + 728693.

It is an arithmetic number, because the mean of its divisors is an integer number (45157328).

Almost surely, 2^509840450 is an apocalyptic number.

509840450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

509840450 is an abundant number, since it is smaller than the sum of its proper divisors (573935422).

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

509840450 is a wasteful number, since it uses less digits than its factorization.

509840450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456706 (or 1456701 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 509840450 is about 22579.6468085752. The cubic root of 509840450 is about 798.8736492868.

The spelling of 509840450 in words is "five hundred nine million, eight hundred forty thousand, four hundred fifty".