8979920 has 20 divisors (see below), whose sum is σ = 20878500. Its totient is φ = 3591936.

The previous prime is 8979907. The next prime is 8979923. The reversal of 8979920 is 299798.

It can be written as a sum of positive squares in 2 ways, for example, as 6130576 + 2849344 = 2476^2 + 1688^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8979923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56045 + ... + 56204.

It is an arithmetic number, because the mean of its divisors is an integer number (1043925).

Almost surely, 2^8979920 is an apocalyptic number.

8979920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8979920 is an abundant number, since it is smaller than the sum of its proper divisors (11898580).

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

8979920 is a wasteful number, since it uses less digits than its factorization.

8979920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112262 (or 112256 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 8979920 is about 2996.6514645517. The cubic root of 8979920 is about 207.8535705096.

The spelling of 8979920 in words is "eight million, nine hundred seventy-nine thousand, nine hundred twenty".