1921280468 has 6 divisors (see below), whose sum is σ = 3362240826. Its totient is φ = 960640232.

The previous prime is 1921280467. The next prime is 1921280477. The reversal of 1921280468 is 8640821291.

It can be written as a sum of positive squares in only one way, i.e., 1920893584 + 386884 = 43828^2 + 622^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921280467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240160055 + ... + 240160062.

It is an arithmetic number, because the mean of its divisors is an integer number (560373471).

Almost surely, 2^1921280468 is an apocalyptic number.

It is an amenable number.

1921280468 is a deficient number, since it is larger than the sum of its proper divisors (1440960358).

1921280468 is a wasteful number, since it uses less digits than its factorization.

1921280468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480320121 (or 480320119 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 1921280468 is about 43832.4134402841. The cubic root of 1921280468 is about 1243.1692404120.

The spelling of 1921280468 in words is "one billion, nine hundred twenty-one million, two hundred eighty thousand, four hundred sixty-eight".