490487840 has 24 divisors (see below), whose sum is σ = 1158777900. Its totient is φ = 196195072.

The previous prime is 490487839. The next prime is 490487849. The reversal of 490487840 is 48784094.

It can be written as a sum of positive squares in 2 ways, for example, as 436141456 + 54346384 = 20884^2 + 7372^2 .

It is a super-3 number, since 3×490487840³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 490487791 and 490487800.

It is not an unprimeable number, because it can be changed into a prime (490487849) 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, 1532615 + ... + 1532934.

Almost surely, 2^490487840 is an apocalyptic number.

490487840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

490487840 is an abundant number, since it is smaller than the sum of its proper divisors (668290060).

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

490487840 is a wasteful number, since it uses less digits than its factorization.

490487840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065564 (or 3065556 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 490487840 is about 22146.9600622749. The cubic root of 490487840 is about 788.6350622778.

The spelling of 490487840 in words is "four hundred ninety million, four hundred eighty-seven thousand, eight hundred forty".