1219468440 has 64 divisors (see below), whose sum is σ = 3673071360. Its totient is φ = 323888000.

The previous prime is 1219468427. The next prime is 1219468489. The reversal of 1219468440 is 448649121.

It is a congruent number.

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, 9877 + ... + 50363.

It is an arithmetic number, because the mean of its divisors is an integer number (57391740).

Almost surely, 2^1219468440 is an apocalyptic number.

1219468440 is a gapful number since it is divisible by the number (10) 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 1219468440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1836535680).

1219468440 is an abundant number, since it is smaller than the sum of its proper divisors (2453602920).

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

1219468440 is a wasteful number, since it uses less digits than its factorization.

1219468440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40752 (or 40748 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 1219468440 is about 34920.8883048527. Note that the first 3 decimals coincide. The cubic root of 1219468440 is about 1068.3745197185.

The spelling of 1219468440 in words is "one billion, two hundred nineteen million, four hundred sixty-eight thousand, four hundred forty".