509648378 has 8 divisors (see below), whose sum is σ = 790833780. Its totient is φ = 246037120.

The previous prime is 509648317. The next prime is 509648387. The reversal of 509648378 is 873846905.

It can be written as a sum of positive squares in 2 ways, for example, as 505935049 + 3713329 = 22493^2 + 1927^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4393463 + ... + 4393578.

Almost surely, 2^509648378 is an apocalyptic number.

509648378 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

509648378 is a deficient number, since it is larger than the sum of its proper divisors (281185402).

509648378 is a wasteful number, since it uses less digits than its factorization.

509648378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8787072.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 509648378 is about 22575.3931970187. The cubic root of 509648378 is about 798.7733168971.

The spelling of 509648378 in words is "five hundred nine million, six hundred forty-eight thousand, three hundred seventy-eight".