1228863 has 8 divisors (see below), whose sum is σ = 1724800. Its totient is φ = 776088.

The previous prime is 1228861. The next prime is 1228883. The reversal of 1228863 is 3688221.

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

It is not a de Polignac number, because 1228863 - 2¹ = 1228861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1228863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10723 + ... + 10836.

It is an arithmetic number, because the mean of its divisors is an integer number (215600).

2^1228863 is an apocalyptic number.

1228863 is a deficient number, since it is larger than the sum of its proper divisors (495937).

1228863 is a wasteful number, since it uses less digits than its factorization.

1228863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21581.

The product of its digits is 4608, while the sum is 30.

The square root of 1228863 is about 1108.5409329384. The cubic root of 1228863 is about 107.1111024626. Note that the first 4 decimals are identical.

The spelling of 1228863 in words is "one million, two hundred twenty-eight thousand, eight hundred sixty-three".