490643578 has 32 divisors (see below), whose sum is σ = 764225280. Its totient is φ = 236134080.

The previous prime is 490643537. The next prime is 490643581. The reversal of 490643578 is 875346094.

It is a super-2 number, since 2×490643578² = 481462241265284168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2052783 + ... + 2053021.

It is an arithmetic number, because the mean of its divisors is an integer number (23882040).

Almost surely, 2^490643578 is an apocalyptic number.

490643578 is a deficient number, since it is larger than the sum of its proper divisors (273581702).

490643578 is a wasteful number, since it uses less digits than its factorization.

490643578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 490643578 is about 22150.4757962442. The cubic root of 490643578 is about 788.7185216696.

It can be divided in two parts, 4906 and 43578, that added together give a palindrome (48484).

The spelling of 490643578 in words is "four hundred ninety million, six hundred forty-three thousand, five hundred seventy-eight".