630639340 has 12 divisors (see below), whose sum is σ = 1324342656. Its totient is φ = 252255728.

The previous prime is 630639337. The next prime is 630639343. The reversal of 630639340 is 43936036.

It is an interprime number because it is at equal distance from previous prime (630639337) and next prime (630639343).

It is a junction number, because it is equal to n+sod(n) for n = 630639296 and 630639305.

It is not an unprimeable number, because it can be changed into a prime (630639343) 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, 15765964 + ... + 15766003.

It is an arithmetic number, because the mean of its divisors is an integer number (110361888).

Almost surely, 2^630639340 is an apocalyptic number.

It is an amenable number.

630639340 is an abundant number, since it is smaller than the sum of its proper divisors (693703316).

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

630639340 is a wasteful number, since it uses less digits than its factorization.

630639340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31531976 (or 31531974 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 34.

The square root of 630639340 is about 25112.5335241190. The cubic root of 630639340 is about 857.5517805687.

The spelling of 630639340 in words is "six hundred thirty million, six hundred thirty-nine thousand, three hundred forty".