1317828650 has 24 divisors (see below), whose sum is σ = 2452229580. Its totient is φ = 526901760.

The previous prime is 1317828649. The next prime is 1317828653. The reversal of 1317828650 is 568287131.

It can be written as a sum of positive squares in 6 ways, for example, as 1096205881 + 221622769 = 33109^2 + 14887^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1317828598 and 1317828607.

It is not an unprimeable number, because it can be changed into a prime (1317828653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154292 + ... + 162608.

Almost surely, 2^1317828650 is an apocalyptic number.

1317828650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1317828650 is a deficient number, since it is larger than the sum of its proper divisors (1134400930).

1317828650 is a wasteful number, since it uses less digits than its factorization.

1317828650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11498 (or 11493 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 1317828650 is about 36301.9097293793. The cubic root of 1317828650 is about 1096.3594937758.

The spelling of 1317828650 in words is "one billion, three hundred seventeen million, eight hundred twenty-eight thousand, six hundred fifty".