7856920 has 32 divisors (see below), whose sum is σ = 17884800. Its totient is φ = 3106048.

The previous prime is 7856911. The next prime is 7856921. The reversal of 7856920 is 296587.

It is a self number, because there is not a number n which added to its sum of digits gives 7856920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7856921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2457 + ... + 4663.

It is an arithmetic number, because the mean of its divisors is an integer number (558900).

Almost surely, 2^7856920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7856920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8942400).

7856920 is an abundant number, since it is smaller than the sum of its proper divisors (10027880).

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

7856920 is a wasteful number, since it uses less digits than its factorization.

7856920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307 (or 2303 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 7856920 is about 2803.0198001441. The cubic root of 7856920 is about 198.8004868906.

The spelling of 7856920 in words is "seven million, eight hundred fifty-six thousand, nine hundred twenty".