8945981920 has 48 divisors (see below), whose sum is σ = 21141334368. Its totient is φ = 3577300480.

The previous prime is 8945981911. The next prime is 8945981923. The reversal of 8945981920 is 291895498.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8945981923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701037 + ... + 713683.

It is an arithmetic number, because the mean of its divisors is an integer number (440444466).

Almost surely, 2^8945981920 is an apocalyptic number.

8945981920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8945981920 is an abundant number, since it is smaller than the sum of its proper divisors (12195352448).

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

8945981920 is a wasteful number, since it uses less digits than its factorization.

8945981920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17083 (or 17075 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 55.

The square root of 8945981920 is about 94583.2010454288. The cubic root of 8945981920 is about 2075.9139087384.

The spelling of 8945981920 in words is "eight billion, nine hundred forty-five million, nine hundred eighty-one thousand, nine hundred twenty".