490709640 has 64 divisors (see below), whose sum is σ = 1473940800. Its totient is φ = 130694912.

The previous prime is 490709629. The next prime is 490709647. The reversal of 490709640 is 46907094.

It is not an unprimeable number, because it can be changed into a prime (490709647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120274 + ... + 124286.

It is an arithmetic number, because the mean of its divisors is an integer number (23030325).

Almost surely, 2^490709640 is an apocalyptic number.

490709640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

490709640 is an abundant number, since it is smaller than the sum of its proper divisors (983231160).

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

490709640 is a wasteful number, since it uses less digits than its factorization.

490709640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5046 (or 5042 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 490709640 is about 22151.9669555550. The cubic root of 490709640 is about 788.7539187052.

The spelling of 490709640 in words is "four hundred ninety million, seven hundred nine thousand, six hundred forty".