1219263864 has 192 divisors, whose sum is σ = 3848977440. Its totient is φ = 319011840.

The previous prime is 1219263809. The next prime is 1219263889. The reversal of 1219263864 is 4683629121.

1219263864 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2644594 + ... + 2645054.

Almost surely, 2^1219263864 is an apocalyptic number.

1219263864 is a gapful number since it is divisible by the number (14) 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 1219263864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1924488720).

1219263864 is an abundant number, since it is smaller than the sum of its proper divisors (2629713576).

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

1219263864 is a wasteful number, since it uses less digits than its factorization.

1219263864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 659 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 1219263864 is about 34917.9590468859. The cubic root of 1219263864 is about 1068.3147734658.

The spelling of 1219263864 in words is "one billion, two hundred nineteen million, two hundred sixty-three thousand, eight hundred sixty-four".