1228672 has 32 divisors (see below), whose sum is σ = 2539800. Its totient is φ = 591360.

The previous prime is 1228657. The next prime is 1228679. The reversal of 1228672 is 2768221.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1228672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3547 + ... + 3877.

2^1228672 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 1228672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1269900).

1228672 is an abundant number, since it is smaller than the sum of its proper divisors (1311128).

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

1228672 is an equidigital number, since it uses as much as digits as its factorization.

1228672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 362 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 1228672 is about 1108.4547803136. The cubic root of 1228672 is about 107.1055528121.

The spelling of 1228672 in words is "one million, two hundred twenty-eight thousand, six hundred seventy-two".