1213309960 has 16 divisors (see below), whose sum is σ = 2729947500. Its totient is φ = 485323968.

The previous prime is 1213309931. The next prime is 1213309963. The reversal of 1213309960 is 699033121.

It can be written as a sum of positive squares in 2 ways, for example, as 1212850276 + 459684 = 34826^2 + 678^2 .

It is not an unprimeable number, because it can be changed into a prime (1213309963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15166335 + ... + 15166414.

Almost surely, 2^1213309960 is an apocalyptic number.

1213309960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213309960 is an abundant number, since it is smaller than the sum of its proper divisors (1516637540).

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

1213309960 is a wasteful number, since it uses less digits than its factorization.

1213309960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30332760 (or 30332756 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 1213309960 is about 34832.5990991198. The cubic root of 1213309960 is about 1066.5730052309.

The spelling of 1213309960 in words is "one billion, two hundred thirteen million, three hundred nine thousand, nine hundred sixty".