1305199044 has 18 divisors (see below), whose sum is σ = 3299253230. Its totient is φ = 435066336.

The previous prime is 1305199039. The next prime is 1305199057. The reversal of 1305199044 is 4409915031.

It is a happy number.

1305199044 is a `hidden beast` number, since 13 + 0 + 519 + 90 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1304654400 + 544644 = 36120^2 + 738^2 .

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: 36255529 = 1305199044 / (1 + 3 + 0 + 5 + 1 + 9 + 9 + 0 + 4 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18127729 + ... + 18127800.

Almost surely, 2^1305199044 is an apocalyptic number.

It is an amenable number.

1305199044 is an abundant number, since it is smaller than the sum of its proper divisors (1994054186).

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

1305199044 is a wasteful number, since it uses less digits than its factorization.

1305199044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36255539 (or 36255534 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1305199044 is about 36127.5385820844. The cubic root of 1305199044 is about 1092.8458707979.

The spelling of 1305199044 in words is "one billion, three hundred five million, one hundred ninety-nine thousand, forty-four".