9223981920 has 120 divisors (see below), whose sum is σ = 32553015264. Its totient is φ = 2459725056.

The previous prime is 9223981919. The next prime is 9223981951. The reversal of 9223981920 is 291893229.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 342904 + ... + 368823.

Almost surely, 2^9223981920 is an apocalyptic number.

9223981920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9223981920 is an abundant number, since it is smaller than the sum of its proper divisors (23329033344).

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

9223981920 is a wasteful number, since it uses less digits than its factorization.

9223981920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711754 (or 711737 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 9223981920 is about 96041.5635024753. The cubic root of 9223981920 is about 2097.1982227720.

The spelling of 9223981920 in words is "nine billion, two hundred twenty-three million, nine hundred eighty-one thousand, nine hundred twenty".