630540340 has 12 divisors (see below), whose sum is σ = 1324134756. Its totient is φ = 252216128.

The previous prime is 630540329. The next prime is 630540343. The reversal of 630540340 is 43045036.

It can be written as a sum of positive squares in 2 ways, for example, as 444872464 + 185667876 = 21092^2 + 13626^2 .

It is a super-2 number, since 2×630540340² = 795162240734631200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630540343) 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, 15763489 + ... + 15763528.

It is an arithmetic number, because the mean of its divisors is an integer number (110344563).

Almost surely, 2^630540340 is an apocalyptic number.

It is an amenable number.

630540340 is an abundant number, since it is smaller than the sum of its proper divisors (693594416).

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

630540340 is a wasteful number, since it uses less digits than its factorization.

630540340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31527026 (or 31527024 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 630540340 is about 25110.5623194703. The cubic root of 630540340 is about 857.5069043805.

Adding to 630540340 its reverse (43045036), we get a palindrome (673585376).

The spelling of 630540340 in words is "six hundred thirty million, five hundred forty thousand, three hundred forty".