1228716 has 48 divisors (see below), whose sum is σ = 3297280. Its totient is φ = 395280.

The previous prime is 1228693. The next prime is 1228741. The reversal of 1228716 is 6178221.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1228716.

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 15 ways as a sum of consecutive naturals, for example, 3165 + ... + 3531.

2^1228716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1648640).

1228716 is an abundant number, since it is smaller than the sum of its proper divisors (2068564).

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

1228716 is a wasteful number, since it uses less digits than its factorization.

1228716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 403 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 1228716 is about 1108.4746275851. The cubic root of 1228716 is about 107.1068313166.

The spelling of 1228716 in words is "one million, two hundred twenty-eight thousand, seven hundred sixteen".