1912722336 has 240 divisors, whose sum is σ = 6469182720. Its totient is φ = 543075840.

The previous prime is 1912722313. The next prime is 1912722337. The reversal of 1912722336 is 6332272191.

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

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1912722336.

It is not an unprimeable number, because it can be changed into a prime (1912722337) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4916830 + ... + 4917218.

It is an arithmetic number, because the mean of its divisors is an integer number (26954928).

Almost surely, 2^1912722336 is an apocalyptic number.

1912722336 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 1912722336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3234591360).

1912722336 is an abundant number, since it is smaller than the sum of its proper divisors (4556460384).

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

1912722336 is a wasteful number, since it uses less digits than its factorization.

1912722336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689 (or 672 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 1912722336 is about 43734.6811580924. The cubic root of 1912722336 is about 1241.3206394570.

The spelling of 1912722336 in words is "one billion, nine hundred twelve million, seven hundred twenty-two thousand, three hundred thirty-six".