630305280 has 320 divisors, whose sum is σ = 2445379200. Its totient is φ = 152616960.

The previous prime is 630305219. The next prime is 630305281. The reversal of 630305280 is 82503036.

630305280 is a `hidden beast` number, since 630 + 3 + 0 + 5 + 28 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

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 (630305281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 759906 + ... + 760734.

It is an arithmetic number, because the mean of its divisors is an integer number (7641810).

Almost surely, 2^630305280 is an apocalyptic number.

630305280 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 630305280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1222689600).

630305280 is an abundant number, since it is smaller than the sum of its proper divisors (1815073920).

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

630305280 is a wasteful number, since it uses less digits than its factorization.

630305280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 630305280 is about 25105.8813826561. The cubic root of 630305280 is about 857.4003340774.

The spelling of 630305280 in words is "six hundred thirty million, three hundred five thousand, two hundred eighty".