1228176685 has 16 divisors (see below), whose sum is σ = 1503063216. Its totient is φ = 963076608.

The previous prime is 1228176683. The next prime is 1228176749. The reversal of 1228176685 is 5866718221.

It can be written as a sum of positive squares in 8 ways, for example, as 6953769 + 1221222916 = 2637^2 + 34946^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228176685 - 2¹ = 1228176683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228176683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437707 + ... + 440503.

It is an arithmetic number, because the mean of its divisors is an integer number (93941451).

Almost surely, 2^1228176685 is an apocalyptic number.

It is an amenable number.

1228176685 is a deficient number, since it is larger than the sum of its proper divisors (274886531).

1228176685 is a wasteful number, since it uses less digits than its factorization.

1228176685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512.

The product of its digits is 322560, while the sum is 46.

The square root of 1228176685 is about 35045.3518315910. The cubic root of 1228176685 is about 1070.9115837717.

The spelling of 1228176685 in words is "one billion, two hundred twenty-eight million, one hundred seventy-six thousand, six hundred eighty-five".