1219428 has 48 divisors (see below), whose sum is σ = 3615360. Its totient is φ = 348192.

The previous prime is 1219411. The next prime is 1219433. The reversal of 1219428 is 8249121.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51 + ... + 1562.

It is an arithmetic number, because the mean of its divisors is an integer number (75320).

2^1219428 is an apocalyptic number.

1219428 is a gapful number since it is divisible by the number (18) 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 1219428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1807680).

1219428 is an abundant number, since it is smaller than the sum of its proper divisors (2395932).

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

1219428 is a wasteful number, since it uses less digits than its factorization.

1219428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633 (or 1625 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 1219428 is about 1104.2771391277. The cubic root of 1219428 is about 106.8362709780.

The spelling of 1219428 in words is "one million, two hundred nineteen thousand, four hundred twenty-eight".