630136452 has 48 divisors (see below), whose sum is σ = 1611251712. Its totient is φ = 190085280.

The previous prime is 630136427. The next prime is 630136453. The reversal of 630136452 is 254631036.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (630136453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18733 + ... + 40139.

It is an arithmetic number, because the mean of its divisors is an integer number (33567744).

Almost surely, 2^630136452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 630136452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (805625856).

630136452 is an abundant number, since it is smaller than the sum of its proper divisors (981115260).

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

630136452 is a wasteful number, since it uses less digits than its factorization.

630136452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21648 (or 21646 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 630136452 is about 25102.5188377581. The cubic root of 630136452 is about 857.3237753504.

Adding to 630136452 its reverse (254631036), we get a palindrome (884767488).

The spelling of 630136452 in words is "six hundred thirty million, one hundred thirty-six thousand, four hundred fifty-two".