1309738040 has 32 divisors (see below), whose sum is σ = 3173597280. Its totient is φ = 483595392.

The previous prime is 1309738033. The next prime is 1309738051. The reversal of 1309738040 is 408379031.

It is a congruent number.

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, 1258844 + ... + 1259883.

It is an arithmetic number, because the mean of its divisors is an integer number (99174915).

Almost surely, 2^1309738040 is an apocalyptic number.

1309738040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1309738040 is an abundant number, since it is smaller than the sum of its proper divisors (1863859240).

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

1309738040 is a wasteful number, since it uses less digits than its factorization.

1309738040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2518751 (or 2518747 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1309738040 is about 36190.3031211401. The cubic root of 1309738040 is about 1094.1112420261. Note that the first 3 decimals are identical.

The spelling of 1309738040 in words is "one billion, three hundred nine million, seven hundred thirty-eight thousand, forty".