509255778 has 8 divisors (see below), whose sum is σ = 1018511568. Its totient is φ = 169751924.

The previous prime is 509255771. The next prime is 509255779. The reversal of 509255778 is 877552905.

It is a sphenic number, since it is the product of 3 distinct primes.

509255778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (509255771) 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 3 ways as a sum of consecutive naturals, for example, 42437976 + ... + 42437987.

It is an arithmetic number, because the mean of its divisors is an integer number (127313946).

Almost surely, 2^509255778 is an apocalyptic number.

509255778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

509255778 is a wasteful number, since it uses less digits than its factorization.

509255778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84875968.

The product of its (nonzero) digits is 882000, while the sum is 48.

The square root of 509255778 is about 22566.6962136685. The cubic root of 509255778 is about 798.5681565176.

The spelling of 509255778 in words is "five hundred nine million, two hundred fifty-five thousand, seven hundred seventy-eight".