7828865 has 16 divisors (see below), whose sum is σ = 10333440. Its totient is φ = 5646720.

The previous prime is 7828853. The next prime is 7828879. The reversal of 7828865 is 5688287.

It is a de Polignac number, because none of the positive numbers 2^k-7828865 is a prime.

It is a super-2 number, since 2×7828865² = 122582254376450, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7016 + ... + 8054.

It is an arithmetic number, because the mean of its divisors is an integer number (645840).

Almost surely, 2^7828865 is an apocalyptic number.

It is an amenable number.

7828865 is a deficient number, since it is larger than the sum of its proper divisors (2504575).

7828865 is a wasteful number, since it uses less digits than its factorization.

7828865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192.

The product of its digits is 215040, while the sum is 44.

The square root of 7828865 is about 2798.0109006221. The cubic root of 7828865 is about 198.5635832323.

The spelling of 7828865 in words is "seven million, eight hundred twenty-eight thousand, eight hundred sixty-five".