1306139732 has 48 divisors (see below), whose sum is σ = 2419587072. Its totient is φ = 615727200.

The previous prime is 1306139719. The next prime is 1306139773. The reversal of 1306139732 is 2379316031.

It is a junction number, because it is equal to n+sod(n) for n = 1306139692 and 1306139701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2319683 + ... + 2320245.

It is an arithmetic number, because the mean of its divisors is an integer number (50408064).

Almost surely, 2^1306139732 is an apocalyptic number.

It is an amenable number.

1306139732 is a deficient number, since it is larger than the sum of its proper divisors (1113447340).

1306139732 is a wasteful number, since it uses less digits than its factorization.

1306139732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908 (or 906 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 1306139732 is about 36140.5552253974. Note that the first 3 decimals coincide. The cubic root of 1306139732 is about 1093.1083544207.

The spelling of 1306139732 in words is "one billion, three hundred six million, one hundred thirty-nine thousand, seven hundred thirty-two".