506684578 has 8 divisors (see below), whose sum is σ = 786234780. Its totient is φ = 244606320.

The previous prime is 506684573. The next prime is 506684593. The reversal of 506684578 is 875486605.

It can be written as a sum of positive squares in 2 ways, for example, as 472497169 + 34187409 = 21737^2 + 5847^2 .

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

It is not an unprimeable number, because it can be changed into a prime (506684573) 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, 4367913 + ... + 4368028.

Almost surely, 2^506684578 is an apocalyptic number.

506684578 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

506684578 is a deficient number, since it is larger than the sum of its proper divisors (279550202).

506684578 is a wasteful number, since it uses less digits than its factorization.

506684578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8735972.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The square root of 506684578 is about 22509.6552172618. The cubic root of 506684578 is about 797.2219150134.

The spelling of 506684578 in words is "five hundred six million, six hundred eighty-four thousand, five hundred seventy-eight".