1306989890 has 8 divisors (see below), whose sum is σ = 2352581820. Its totient is φ = 522795952.

The previous prime is 1306989863. The next prime is 1306989941. The reversal of 1306989890 is 989896031.

It can be written as a sum of positive squares in 2 ways, for example, as 1292618209 + 14371681 = 35953^2 + 3791^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65349485 + ... + 65349504.

Almost surely, 2^1306989890 is an apocalyptic number.

1306989890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1306989890 is a deficient number, since it is larger than the sum of its proper divisors (1045591930).

1306989890 is a wasteful number, since it uses less digits than its factorization.

1306989890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130698996.

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 1306989890 is about 36152.3151402507. The cubic root of 1306989890 is about 1093.3454687289.

The spelling of 1306989890 in words is "one billion, three hundred six million, nine hundred eighty-nine thousand, eight hundred ninety".