1921273248 has 96 divisors (see below), whose sum is σ = 5220452160. Its totient is φ = 618209280.

The previous prime is 1921273247. The next prime is 1921273279. The reversal of 1921273248 is 8423721291.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (1921273247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463248 + ... + 467376.

It is an arithmetic number, because the mean of its divisors is an integer number (54379710).

Almost surely, 2^1921273248 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 1921273248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2610226080).

1921273248 is an abundant number, since it is smaller than the sum of its proper divisors (3299178912).

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

1921273248 is a wasteful number, since it uses less digits than its factorization.

1921273248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4310 (or 4302 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 1921273248 is about 43832.3310810639. The cubic root of 1921273248 is about 1243.1676831705.

The spelling of 1921273248 in words is "one billion, nine hundred twenty-one million, two hundred seventy-three thousand, two hundred forty-eight".