7821896 has 16 divisors (see below), whose sum is σ = 14730540. Its totient is φ = 3893760.

The previous prime is 7821893. The next prime is 7821907. The reversal of 7821896 is 6981287.

It can be written as a sum of positive squares in 2 ways, for example, as 7672900 + 148996 = 2770^2 + 386^2 .

It is a super-2 number, since 2×7821896² = 122364114069632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7821893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101 + ... + 3956.

Almost surely, 2^7821896 is an apocalyptic number.

It is an amenable number.

7821896 is a deficient number, since it is larger than the sum of its proper divisors (6908644).

7821896 is a wasteful number, since it uses less digits than its factorization.

7821896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4304 (or 4300 counting only the distinct ones).

The product of its digits is 48384, while the sum is 41.

The square root of 7821896 is about 2796.7652743840. The cubic root of 7821896 is about 198.5046474684.

The spelling of 7821896 in words is "seven million, eight hundred twenty-one thousand, eight hundred ninety-six".