494287578 has 24 divisors (see below), whose sum is σ = 1076400468. Its totient is φ = 163924992.

The previous prime is 494287567. The next prime is 494287583. The reversal of 494287578 is 875782494.

It is a happy number.

494287578 is a `hidden beast` number, since 49 + 4 + 28 + 7 + 578 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 361646289 + 132641289 = 19017^2 + 11517^2 .

It is a super-3 number, since 3×494287578³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66151 + ... + 73242.

Almost surely, 2^494287578 is an apocalyptic number.

494287578 is an abundant number, since it is smaller than the sum of its proper divisors (582112890).

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

494287578 is a wasteful number, since it uses less digits than its factorization.

494287578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139598 (or 139595 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The square root of 494287578 is about 22232.5792026027. The cubic root of 494287578 is about 790.6663064193. Note that the first 3 decimals are identical.

The spelling of 494287578 in words is "four hundred ninety-four million, two hundred eighty-seven thousand, five hundred seventy-eight".