1921267712 has 192 divisors, whose sum is σ = 4834065600. Its totient is φ = 747601920.

The previous prime is 1921267709. The next prime is 1921267727. The reversal of 1921267712 is 2177621291.

It is a happy number.

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, 31496162 + ... + 31496222.

It is an arithmetic number, because the mean of its divisors is an integer number (25177425).

Almost surely, 2^1921267712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1921267712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2417032800).

1921267712 is an abundant number, since it is smaller than the sum of its proper divisors (2912797888).

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

1921267712 is an frugal number, since it uses more digits than its factorization.

1921267712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 83 counting only the distinct ones).

The product of its digits is 21168, while the sum is 38.

The square root of 1921267712 is about 43832.2679312855. The cubic root of 1921267712 is about 1243.1664891389.

The spelling of 1921267712 in words is "one billion, nine hundred twenty-one million, two hundred sixty-seven thousand, seven hundred twelve".