1921248984 has 32 divisors (see below), whose sum is σ = 4811598000. Its totient is φ = 639286272.

The previous prime is 1921248947. The next prime is 1921248991. The reversal of 1921248984 is 4898421291.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56689 + ... + 84000.

Almost surely, 2^1921248984 is an apocalyptic number.

It is an amenable number.

1921248984 is an abundant number, since it is smaller than the sum of its proper divisors (2890349016).

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

1921248984 is a wasteful number, since it uses less digits than its factorization.

1921248984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141267 (or 141263 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 1921248984 is about 43832.0542981960. The cubic root of 1921248984 is about 1243.1624497751.

The spelling of 1921248984 in words is "one billion, nine hundred twenty-one million, two hundred forty-eight thousand, nine hundred eighty-four".