7897856 has 18 divisors (see below), whose sum is σ = 15765372. Its totient is φ = 3948800.

The previous prime is 7897849. The next prime is 7897861. The reversal of 7897856 is 6587987.

It is a happy number.

It is a super-2 number, since 2×7897856² = 124752258793472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15170 + ... + 15681.

It is an arithmetic number, because the mean of its divisors is an integer number (875854).

Almost surely, 2^7897856 is an apocalyptic number.

It is an amenable number.

7897856 is a deficient number, since it is larger than the sum of its proper divisors (7867516).

7897856 is an equidigital number, since it uses as much as digits as its factorization.

7897856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30867 (or 30853 counting only the distinct ones).

The product of its digits is 846720, while the sum is 50.

The square root of 7897856 is about 2810.3124381463. The cubic root of 7897856 is about 199.1451513749.

The spelling of 7897856 in words is "seven million, eight hundred ninety-seven thousand, eight hundred fifty-six".