1219288212 has 72 divisors (see below), whose sum is σ = 3304828800. Its totient is φ = 377664768.

The previous prime is 1219288207. The next prime is 1219288223. The reversal of 1219288212 is 2128829121.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35739 + ... + 60957.

It is an arithmetic number, because the mean of its divisors is an integer number (45900400).

Almost surely, 2^1219288212 is an apocalyptic number.

1219288212 is a gapful number since it is divisible by the number (12) 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 1219288212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1652414400).

1219288212 is an abundant number, since it is smaller than the sum of its proper divisors (2085540588).

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

1219288212 is a wasteful number, since it uses less digits than its factorization.

1219288212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25325 (or 25320 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 1219288212 is about 34918.3076909520. The cubic root of 1219288212 is about 1068.3218846296.

The spelling of 1219288212 in words is "one billion, two hundred nineteen million, two hundred eighty-eight thousand, two hundred twelve".