630908560 has 20 divisors (see below), whose sum is σ = 1466862588. Its totient is φ = 252363392.

The previous prime is 630908557. The next prime is 630908569. The reversal of 630908560 is 65809036.

It can be written as a sum of positive squares in 2 ways, for example, as 173290896 + 457617664 = 13164^2 + 21392^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×630908560² = 796091222162547200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (630908569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3943099 + ... + 3943258.

Almost surely, 2^630908560 is an apocalyptic number.

It is an amenable number.

630908560 is an abundant number, since it is smaller than the sum of its proper divisors (835954028).

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

630908560 is a wasteful number, since it uses less digits than its factorization.

630908560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7886370 (or 7886364 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 630908560 is about 25117.8932237558. The cubic root of 630908560 is about 857.6737928562.

The spelling of 630908560 in words is "six hundred thirty million, nine hundred eight thousand, five hundred sixty".