8621920 has 24 divisors (see below), whose sum is σ = 20369664. Its totient is φ = 3448704.

The previous prime is 8621911. The next prime is 8621927. The reversal of 8621920 is 291268.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8621927) 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, 26784 + ... + 27103.

It is an arithmetic number, because the mean of its divisors is an integer number (848736).

Almost surely, 2^8621920 is an apocalyptic number.

8621920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8621920 is an abundant number, since it is smaller than the sum of its proper divisors (11747744).

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

8621920 is a wasteful number, since it uses less digits than its factorization.

8621920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53902 (or 53894 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 8621920 is about 2936.3106102727. The cubic root of 8621920 is about 205.0538823265.

The spelling of 8621920 in words is "eight million, six hundred twenty-one thousand, nine hundred twenty".