630128142 has 72 divisors (see below), whose sum is σ = 1615231800. Its totient is φ = 176970528.

The previous prime is 630128131. The next prime is 630128143. The reversal of 630128142 is 241821036.

630128142 is a `hidden beast` number, since 630 + 1 + 28 + 1 + 4 + 2 = 666.

It is a super-2 number, since 2×630128142² = 794122950680744328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630128143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 45984 + ... + 58092.

It is an arithmetic number, because the mean of its divisors is an integer number (22433775).

Almost surely, 2^630128142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 630128142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (807615900).

630128142 is an abundant number, since it is smaller than the sum of its proper divisors (985103658).

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

630128142 is a wasteful number, since it uses less digits than its factorization.

630128142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12190 (or 12180 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 630128142 is about 25102.3533159742. The cubic root of 630128142 is about 857.3200066471.

Adding to 630128142 its reverse (241821036), we get a palindrome (871949178).

It can be divided in two parts, 6301 and 28142, that added together give a palindrome (34443).

The spelling of 630128142 in words is "six hundred thirty million, one hundred twenty-eight thousand, one hundred forty-two".