8921945424 has 60 divisors (see below), whose sum is σ = 26346094496. Its totient is φ = 2548632576.

The previous prime is 8921945407. The next prime is 8921945467. The reversal of 8921945424 is 4245491298.

It is a super-2 number, since 2×8921945424² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1728832 + ... + 1733984.

Almost surely, 2^8921945424 is an apocalyptic number.

8921945424 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

8921945424 is an abundant number, since it is smaller than the sum of its proper divisors (17424149072).

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

8921945424 is an frugal number, since it uses more digits than its factorization.

8921945424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10324 (or 5165 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The square root of 8921945424 is about 94456.0502244298. The cubic root of 8921945424 is about 2074.0530192047.

The spelling of 8921945424 in words is "eight billion, nine hundred twenty-one million, nine hundred forty-five thousand, four hundred twenty-four".