1130728685 has 8 divisors (see below), whose sum is σ = 1357405560. Its totient is φ = 904228864.

The previous prime is 1130728673. The next prime is 1130728693. The reversal of 1130728685 is 5868270311.

It can be written as a sum of positive squares in 4 ways, for example, as 209120521 + 921608164 = 14461^2 + 30358^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1130728685 is a prime.

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, 29780 + ... + 56109.

It is an arithmetic number, because the mean of its divisors is an integer number (169675695).

Almost surely, 2^1130728685 is an apocalyptic number.

It is an amenable number.

1130728685 is a deficient number, since it is larger than the sum of its proper divisors (226676875).

1130728685 is an equidigital number, since it uses as much as digits as its factorization.

1130728685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88527.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 1130728685 is about 33626.3094168837. The cubic root of 1130728685 is about 1041.8042782962.

Adding to 1130728685 its reverse (5868270311), we get a palindrome (6998998996).

The spelling of 1130728685 in words is "one billion, one hundred thirty million, seven hundred twenty-eight thousand, six hundred eighty-five".