1190216865 has 8 divisors (see below), whose sum is σ = 1904347008. Its totient is φ = 634782320.

The previous prime is 1190216837. The next prime is 1190216879. The reversal of 1190216865 is 5686120911.

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

It is not a de Polignac number, because 1190216865 - 2⁹ = 1190216353 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 39673881 + ... + 39673910.

It is an arithmetic number, because the mean of its divisors is an integer number (238043376).

Almost surely, 2^1190216865 is an apocalyptic number.

1190216865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1190216865 is a deficient number, since it is larger than the sum of its proper divisors (714130143).

1190216865 is an equidigital number, since it uses as much as digits as its factorization.

1190216865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79347799.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 1190216865 is about 34499.5197792665. The cubic root of 1190216865 is about 1059.7628711884.

The spelling of 1190216865 in words is "one billion, one hundred ninety million, two hundred sixteen thousand, eight hundred sixty-five".