646327080 has 512 divisors, whose sum is σ = 2687385600. Its totient is φ = 134811648.

The previous prime is 646327069. The next prime is 646327133. The reversal of 646327080 is 80723646.

646327080 = T₃₈₉ + T₃₉₀ + ... + T₁₅₇₈.

646327080 is a `hidden beast` number, since 646 + 3 + 2 + 7 + 0 + 8 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6040387 + ... + 6040493.

It is an arithmetic number, because the mean of its divisors is an integer number (5248800).

Almost surely, 2^646327080 is an apocalyptic number.

646327080 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 646327080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1343692800).

646327080 is an abundant number, since it is smaller than the sum of its proper divisors (2041058520).

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

646327080 is a wasteful number, since it uses less digits than its factorization.

646327080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 646327080 is about 25422.9636352649. The cubic root of 646327080 is about 864.6044188958.

The spelling of 646327080 in words is "six hundred forty-six million, three hundred twenty-seven thousand, eighty".