1630328280 has 128 divisors (see below), whose sum is σ = 5610401280. Its totient is φ = 371266560.

The previous prime is 1630328279. The next prime is 1630328311. The reversal of 1630328280 is 828230361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232587 + ... + 239493.

It is an arithmetic number, because the mean of its divisors is an integer number (43831260).

Almost surely, 2^1630328280 is an apocalyptic number.

1630328280 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 1630328280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2805200640).

1630328280 is an abundant number, since it is smaller than the sum of its proper divisors (3980073000).

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

1630328280 is a wasteful number, since it uses less digits than its factorization.

1630328280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7209 (or 7205 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 1630328280 is about 40377.3238340532. The cubic root of 1630328280 is about 1176.9509234499.

The spelling of 1630328280 in words is "one billion, six hundred thirty million, three hundred twenty-eight thousand, two hundred eighty".