490645440 has 84 divisors (see below), whose sum is σ = 1687625784. Its totient is φ = 130838016.

The previous prime is 490645439. The next prime is 490645447. The reversal of 490645440 is 44546094.

490645440 is a `hidden beast` number, since 4 + 9 + 0 + 645 + 4 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 490645395 and 490645404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490645447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82302 + ... + 88061.

Almost surely, 2^490645440 is an apocalyptic number.

490645440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

490645440 is an abundant number, since it is smaller than the sum of its proper divisors (1196980344).

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

490645440 is a wasteful number, since it uses less digits than its factorization.

490645440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170386 (or 170373 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 490645440 is about 22150.5178269042. The cubic root of 490645440 is about 788.7195194013.

The spelling of 490645440 in words is "four hundred ninety million, six hundred forty-five thousand, four hundred forty".