1228367565 has 32 divisors (see below), whose sum is σ = 2186361600. Its totient is φ = 654350400.

The previous prime is 1228367563. The next prime is 1228367573. The reversal of 1228367565 is 5657638221.

1228367565 is a `hidden beast` number, since 1 + 2 + 2 + 83 + 6 + 7 + 565 = 666.

It is not a de Polignac number, because 1228367565 - 2¹ = 1228367563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1228367565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228367563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119115 + ... + 129015.

It is an arithmetic number, because the mean of its divisors is an integer number (68323800).

Almost surely, 2^1228367565 is an apocalyptic number.

1228367565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1228367565 is a deficient number, since it is larger than the sum of its proper divisors (957994035).

1228367565 is an equidigital number, since it uses as much as digits as its factorization.

1228367565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10834 (or 10828 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 1228367565 is about 35048.0750541310. The cubic root of 1228367565 is about 1070.9670603213.

The spelling of 1228367565 in words is "one billion, two hundred twenty-eight million, three hundred sixty-seven thousand, five hundred sixty-five".