7855872 has 72 divisors (see below), whose sum is σ = 21412944. Its totient is φ = 2555904.

The previous prime is 7855871. The next prime is 7855891. The reversal of 7855872 is 2785587.

It is a happy number.

It is a d-powerful number, because it can be written as 7⁶ + 8² + 5⁶ + 5⁹ + 8³ + 7⁸ + 2¹² .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7855871) 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, 40608 + ... + 40800.

It is an arithmetic number, because the mean of its divisors is an integer number (297402).

Almost surely, 2^7855872 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 7855872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10706472).

7855872 is an abundant number, since it is smaller than the sum of its proper divisors (13557072).

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

7855872 is a wasteful number, since it uses less digits than its factorization.

7855872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 251 counting only the distinct ones).

The product of its digits is 156800, while the sum is 42.

The square root of 7855872 is about 2802.8328526689. The cubic root of 7855872 is about 198.7916474568.

The spelling of 7855872 in words is "seven million, eight hundred fifty-five thousand, eight hundred seventy-two".