509476978 has 32 divisors (see below), whose sum is σ = 827668800. Its totient is φ = 234330624.

The previous prime is 509476949. The next prime is 509476999. The reversal of 509476978 is 879674905.

It is a super-2 number, since 2×509476978² = 519133582224024968, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 315838 + ... + 317446.

It is an arithmetic number, because the mean of its divisors is an integer number (25864650).

Almost surely, 2^509476978 is an apocalyptic number.

509476978 is a deficient number, since it is larger than the sum of its proper divisors (318191822).

509476978 is a wasteful number, since it uses less digits than its factorization.

509476978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The square root of 509476978 is about 22571.5967091387. The cubic root of 509476978 is about 798.6837616250.

The spelling of 509476978 in words is "five hundred nine million, four hundred seventy-six thousand, nine hundred seventy-eight".