1630128000 has 128 divisors (see below), whose sum is σ = 5404033440. Its totient is φ = 434688000.

The previous prime is 1630127999. The next prime is 1630128001. The reversal of 1630128000 is 8210361.

It is an interprime number because it is at equal distance from previous prime (1630127999) and next prime (1630128001).

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630128001) 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, 31020 + ... + 64980.

Almost surely, 2^1630128000 is an apocalyptic number.

1630128000 is a gapful number since it is divisible by the number (10) 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 1630128000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2702016720).

1630128000 is an abundant number, since it is smaller than the sum of its proper divisors (3773905440).

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

1630128000 is an equidigital number, since it uses as much as digits as its factorization.

1630128000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33993 (or 33971 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1630128000 is about 40374.8436529481. The cubic root of 1630128000 is about 1176.9027267386.

Adding to 1630128000 its reverse (8210361), we get a palindrome (1638338361).

The spelling of 1630128000 in words is "one billion, six hundred thirty million, one hundred twenty-eight thousand".