646587480 has 512 divisors, whose sum is σ = 2654208000. Its totient is φ = 121927680.

The previous prime is 646587449. The next prime is 646587497. The reversal of 646587480 is 84785646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5091177 + ... + 5091303.

It is an arithmetic number, because the mean of its divisors is an integer number (5184000).

Almost surely, 2^646587480 is an apocalyptic number.

646587480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646587480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1327104000).

646587480 is an abundant number, since it is smaller than the sum of its proper divisors (2007620520).

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

646587480 is a wasteful number, since it uses less digits than its factorization.

646587480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 646587480 is about 25428.0844736681. The cubic root of 646587480 is about 864.7205173689.

The spelling of 646587480 in words is "six hundred forty-six million, five hundred eighty-seven thousand, four hundred eighty".