1309630896 has 80 divisors (see below), whose sum is σ = 4296153600. Its totient is φ = 374179392.

The previous prime is 1309630891. The next prime is 1309630909. The reversal of 1309630896 is 6980369031.

1309630896 is a `hidden beast` number, since 1 + 3 + 0 + 9 + 630 + 8 + 9 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (1309630891) 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, 213516 + ... + 219563.

It is an arithmetic number, because the mean of its divisors is an integer number (53701920).

Almost surely, 2^1309630896 is an apocalyptic number.

1309630896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1309630896 is an abundant number, since it is smaller than the sum of its proper divisors (2986522704).

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

1309630896 is a wasteful number, since it uses less digits than its factorization.

1309630896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433103 (or 433091 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 1309630896 is about 36188.8228048385. The cubic root of 1309630896 is about 1094.0814063775.

The spelling of 1309630896 in words is "one billion, three hundred nine million, six hundred thirty thousand, eight hundred ninety-six".