630242440 has 16 divisors (see below), whose sum is σ = 1418045580. Its totient is φ = 252096960.

The previous prime is 630242429. The next prime is 630242461. The reversal of 630242440 is 44242036.

It can be written as a sum of positive squares in 2 ways, for example, as 621704356 + 8538084 = 24934^2 + 2922^2 .

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, 7877991 + ... + 7878070.

Almost surely, 2^630242440 is an apocalyptic number.

It is an amenable number.

630242440 is an abundant number, since it is smaller than the sum of its proper divisors (787803140).

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

630242440 is a wasteful number, since it uses less digits than its factorization.

630242440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15756072 (or 15756068 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 630242440 is about 25104.6298518819. The cubic root of 630242440 is about 857.3718395106.

Adding to 630242440 its reverse (44242036), we get a palindrome (674484476).

The spelling of 630242440 in words is "six hundred thirty million, two hundred forty-two thousand, four hundred forty".