1219788 has 36 divisors (see below), whose sum is σ = 3185728. Its totient is φ = 393120.

The previous prime is 1219787. The next prime is 1219789. The reversal of 1219788 is 8879121.

It is an interprime number because it is at equal distance from previous prime (1219787) and next prime (1219789).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1219783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 570 + ... + 1662.

2^1219788 is an apocalyptic number.

1219788 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 1219788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1592864).

1219788 is an abundant number, since it is smaller than the sum of its proper divisors (1965940).

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

1219788 is a wasteful number, since it uses less digits than its factorization.

1219788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1129 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 1219788 is about 1104.4401296585. The cubic root of 1219788 is about 106.8467833585.

The spelling of 1219788 in words is "one million, two hundred nineteen thousand, seven hundred eighty-eight".