1228416 has 64 divisors (see below), whose sum is σ = 3737280. Its totient is φ = 350208.

The previous prime is 1228399. The next prime is 1228429. The reversal of 1228416 is 6148221.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2460 + ... + 2916.

It is an arithmetic number, because the mean of its divisors is an integer number (58395).

2^1228416 is an apocalyptic number.

1228416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1868640).

1228416 is an abundant number, since it is smaller than the sum of its proper divisors (2508864).

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

1228416 is an equidigital number, since it uses as much as digits as its factorization.

1228416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 469 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 1228416 is about 1108.3392982296. The cubic root of 1228416 is about 107.0981136349.

The spelling of 1228416 in words is "one million, two hundred twenty-eight thousand, four hundred sixteen".