8939920 has 40 divisors (see below), whose sum is σ = 22677120. Its totient is φ = 3250560.

The previous prime is 8939891. The next prime is 8939921. The reversal of 8939920 is 299398.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8939921) 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, 4200 + ... + 5959.

It is an arithmetic number, because the mean of its divisors is an integer number (566928).

Almost surely, 2^8939920 is an apocalyptic number.

8939920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8939920 is an abundant number, since it is smaller than the sum of its proper divisors (13737200).

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

8939920 is a wasteful number, since it uses less digits than its factorization.

8939920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10183 (or 10177 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 8939920 is about 2989.9698995140. The cubic root of 8939920 is about 207.5444913548.

The spelling of 8939920 in words is "eight million, nine hundred thirty-nine thousand, nine hundred twenty".