7789872 has 20 divisors (see below), whose sum is σ = 20123960. Its totient is φ = 2596608.

The previous prime is 7789871. The next prime is 7789879. The reversal of 7789872 is 2789877.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 162289 = 7789872 / (7 + 7 + 8 + 9 + 8 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (7789871) 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 3 ways as a sum of consecutive naturals, for example, 81097 + ... + 81192.

It is an arithmetic number, because the mean of its divisors is an integer number (1006198).

Almost surely, 2^7789872 is an apocalyptic number.

It is an amenable number.

7789872 is an abundant number, since it is smaller than the sum of its proper divisors (12334088).

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

7789872 is a wasteful number, since it uses less digits than its factorization.

7789872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162300 (or 162294 counting only the distinct ones).

The product of its digits is 395136, while the sum is 48.

The square root of 7789872 is about 2791.0342169167. The cubic root of 7789872 is about 198.2333744507.

The spelling of 7789872 in words is "seven million, seven hundred eighty-nine thousand, eight hundred seventy-two".