1309783650 has 96 divisors (see below), whose sum is σ = 3726809088. Its totient is φ = 298209600.

The previous prime is 1309783627. The next prime is 1309783661. The reversal of 1309783650 is 563879031.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 282249 + ... + 286851.

It is an arithmetic number, because the mean of its divisors is an integer number (38820928).

Almost surely, 2^1309783650 is an apocalyptic number.

1309783650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1309783650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1863404544).

1309783650 is an abundant number, since it is smaller than the sum of its proper divisors (2417025438).

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

1309783650 is a wasteful number, since it uses less digits than its factorization.

1309783650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896 (or 4891 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 1309783650 is about 36190.9332568255. The cubic root of 1309783650 is about 1094.1239422335.

The spelling of 1309783650 in words is "one billion, three hundred nine million, seven hundred eighty-three thousand, six hundred fifty".