630975840 has 96 divisors (see below), whose sum is σ = 2168280576. Its totient is φ = 152962560.

The previous prime is 630975833. The next prime is 630975847. The reversal of 630975840 is 48579036.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (630975833) and next prime (630975847).

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 630975792 and 630975801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630975847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54472 + ... + 65031.

It is an arithmetic number, because the mean of its divisors is an integer number (22586256).

Almost surely, 2^630975840 is an apocalyptic number.

630975840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

630975840 is an abundant number, since it is smaller than the sum of its proper divisors (1537304736).

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

630975840 is a wasteful number, since it uses less digits than its factorization.

630975840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119532 (or 119524 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 630975840 is about 25119.2324723507. The cubic root of 630975840 is about 857.7042791767.

The spelling of 630975840 in words is "six hundred thirty million, nine hundred seventy-five thousand, eight hundred forty".