630207540 has 120 divisors (see below), whose sum is σ = 2004442440. Its totient is φ = 165753216.

The previous prime is 630207533. The next prime is 630207541. The reversal of 630207540 is 45702036.

It is a happy number.

630207540 is a `hidden beast` number, since 630 + 20 + 7 + 5 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 599076 + 629608464 = 774^2 + 25092^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 1095 × 657 × 876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630207541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8632944 + ... + 8633016.

It is an arithmetic number, because the mean of its divisors is an integer number (16703687).

Almost surely, 2^630207540 is an apocalyptic number.

630207540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 630207540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002221220).

630207540 is an abundant number, since it is smaller than the sum of its proper divisors (1374234900).

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

630207540 is an frugal number, since it uses more digits than its factorization.

630207540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 630207540 is about 25103.9347513492. The cubic root of 630207540 is about 857.3560134160.

Adding to 630207540 its reverse (45702036), we get a palindrome (675909576).

The spelling of 630207540 in words is "six hundred thirty million, two hundred seven thousand, five hundred forty".