630244278 has 12 divisors (see below), whose sum is σ = 1365529308. Its totient is φ = 210081420.

The previous prime is 630244271. The next prime is 630244289. The reversal of 630244278 is 872442036.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630244271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17506768 + ... + 17506803.

It is an arithmetic number, because the mean of its divisors is an integer number (113794109).

Almost surely, 2^630244278 is an apocalyptic number.

630244278 is an abundant number, since it is smaller than the sum of its proper divisors (735285030).

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

630244278 is a wasteful number, since it uses less digits than its factorization.

630244278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35013579 (or 35013576 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 630244278 is about 25104.6664586487. Note that the first 3 decimals coincide. The cubic root of 630244278 is about 857.3726729719.

The spelling of 630244278 in words is "six hundred thirty million, two hundred forty-four thousand, two hundred seventy-eight".