630521140 has 12 divisors (see below), whose sum is σ = 1324094436. Its totient is φ = 252208448.

The previous prime is 630521117. The next prime is 630521159. The reversal of 630521140 is 41125036.

It can be written as a sum of positive squares in 2 ways, for example, as 440412196 + 190108944 = 20986^2 + 13788^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15763009 + ... + 15763048.

It is an arithmetic number, because the mean of its divisors is an integer number (110341203).

Almost surely, 2^630521140 is an apocalyptic number.

It is an amenable number.

630521140 is an abundant number, since it is smaller than the sum of its proper divisors (693573296).

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

630521140 is a wasteful number, since it uses less digits than its factorization.

630521140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31526066 (or 31526064 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 630521140 is about 25110.1800073197. The cubic root of 630521140 is about 857.4982005759.

Adding to 630521140 its reverse (41125036), we get a palindrome (671646176).

The spelling of 630521140 in words is "six hundred thirty million, five hundred twenty-one thousand, one hundred forty".