630838390 has 64 divisors (see below), whose sum is σ = 1402168320. Its totient is φ = 198990720.

The previous prime is 630838381. The next prime is 630838391. The reversal of 630838390 is 93838036.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630838391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 325725 + ... + 327655.

It is an arithmetic number, because the mean of its divisors is an integer number (21908880).

Almost surely, 2^630838390 is an apocalyptic number.

630838390 is an abundant number, since it is smaller than the sum of its proper divisors (771329930).

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

630838390 is a wasteful number, since it uses less digits than its factorization.

630838390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 630838390 is about 25116.4963719067. The cubic root of 630838390 is about 857.6419946923.

The spelling of 630838390 in words is "six hundred thirty million, eight hundred thirty-eight thousand, three hundred ninety".