1219868736 has 112 divisors (see below), whose sum is σ = 3325172928. Its totient is φ = 394444800.

The previous prime is 1219868669. The next prime is 1219868803. The reversal of 1219868736 is 6378689121.

It is an interprime number because it is at equal distance from previous prime (1219868669) and next prime (1219868803).

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, 1896831 + ... + 1897473.

It is an arithmetic number, because the mean of its divisors is an integer number (29689044).

Almost surely, 2^1219868736 is an apocalyptic number.

1219868736 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 1219868736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1662586464).

1219868736 is an abundant number, since it is smaller than the sum of its proper divisors (2105304192).

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

1219868736 is a wasteful number, since it uses less digits than its factorization.

1219868736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940 (or 930 counting only the distinct ones).

The product of its digits is 870912, while the sum is 51.

The square root of 1219868736 is about 34926.6193039063. The cubic root of 1219868736 is about 1068.4914065103.

It can be divided in two parts, 12 and 19868736, that multiplied together give a palindrome (238424832).

The spelling of 1219868736 in words is "one billion, two hundred nineteen million, eight hundred sixty-eight thousand, seven hundred thirty-six".