1630725312 has 56 divisors (see below), whose sum is σ = 4541723200. Its totient is φ = 514964736.

The previous prime is 1630725307. The next prime is 1630725377. The reversal of 1630725312 is 2135270361.

It is a self number, because there is not a number n which added to its sum of digits gives 1630725312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219862 + ... + 227157.

It is an arithmetic number, because the mean of its divisors is an integer number (81102200).

Almost surely, 2^1630725312 is an apocalyptic number.

1630725312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1630725312 is an abundant number, since it is smaller than the sum of its proper divisors (2910997888).

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

1630725312 is a wasteful number, since it uses less digits than its factorization.

1630725312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447053 (or 447043 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 1630725312 is about 40382.2400567378. The cubic root of 1630725312 is about 1177.0464562039.

Adding to 1630725312 its reverse (2135270361), we get a palindrome (3765995673).

The spelling of 1630725312 in words is "one billion, six hundred thirty million, seven hundred twenty-five thousand, three hundred twelve".