1306663236 has 18 divisors (see below), whose sum is σ = 3302954382. Its totient is φ = 435554400.

The previous prime is 1306663217. The next prime is 1306663261. The reversal of 1306663236 is 6323666031.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 908660736 + 398002500 = 30144^2 + 19950^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 36296201 = 1306663236 / (1 + 3 + 0 + 6 + 6 + 6 + 3 + 2 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 1306663236.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18148065 + ... + 18148136.

Almost surely, 2^1306663236 is an apocalyptic number.

It is an amenable number.

1306663236 is an abundant number, since it is smaller than the sum of its proper divisors (1996291146).

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

1306663236 is a wasteful number, since it uses less digits than its factorization.

1306663236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36296211 (or 36296206 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 36.

The square root of 1306663236 is about 36147.7971113040. The cubic root of 1306663236 is about 1093.2543750815.

The spelling of 1306663236 in words is "one billion, three hundred six million, six hundred sixty-three thousand, two hundred thirty-six".