646030080 has 432 divisors, whose sum is σ = 2428468224. Its totient is φ = 164229120.

The previous prime is 646030079. The next prime is 646030081. The reversal of 646030080 is 80030646.

It is an interprime number because it is at equal distance from previous prime (646030079) and next prime (646030081).

It is a tau number, because it is divible by the number of its divisors (432).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (646030081) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9642207 + ... + 9642273.

Almost surely, 2^646030080 is an apocalyptic number.

646030080 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 646030080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214234112).

646030080 is an abundant number, since it is smaller than the sum of its proper divisors (1782438144).

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

646030080 is an equidigital number, since it uses as much as digits as its factorization.

646030080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 646030080 is about 25417.1217882749. The cubic root of 646030080 is about 864.4719643624.

The spelling of 646030080 in words is "six hundred forty-six million, thirty thousand, eighty".