8651920 has 40 divisors (see below), whose sum is σ = 20373696. Its totient is φ = 3416448.

The previous prime is 8651917. The next prime is 8651939. The reversal of 8651920 is 291568.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5989 + ... + 7291.

Almost surely, 2^8651920 is an apocalyptic number.

8651920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8651920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10186848).

8651920 is an abundant number, since it is smaller than the sum of its proper divisors (11721776).

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

8651920 is a wasteful number, since it uses less digits than its factorization.

8651920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399 (or 1393 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 8651920 is about 2941.4146256521. The cubic root of 8651920 is about 205.2914355773.

The spelling of 8651920 in words is "eight million, six hundred fifty-one thousand, nine hundred twenty".