630991296 has 168 divisors, whose sum is σ = 2020533424. Its totient is φ = 194088960.

The previous prime is 630991247. The next prime is 630991301. The reversal of 630991296 is 692199036.

It is a happy number.

630991296 is a `hidden beast` number, since 630 + 9 + 9 + 1 + 2 + 9 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200616 + ... + 203736.

Almost surely, 2^630991296 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 630991296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1010266712).

630991296 is an abundant number, since it is smaller than the sum of its proper divisors (1389542128).

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

630991296 is a wasteful number, since it uses less digits than its factorization.

630991296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3161 (or 3139 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 630991296 is about 25119.5401231790. The cubic root of 630991296 is about 857.7112823868.

The spelling of 630991296 in words is "six hundred thirty million, nine hundred ninety-one thousand, two hundred ninety-six".