7820856 has 48 divisors (see below), whose sum is σ = 22300200. Its totient is φ = 2469312.

The previous prime is 7820821. The next prime is 7820881. The reversal of 7820856 is 6580287.

It is a super-2 number, since 2×7820856² = 122331577145472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 7820856.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1491 + ... + 4226.

Almost surely, 2^7820856 is an apocalyptic number.

7820856 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

7820856 is an abundant number, since it is smaller than the sum of its proper divisors (14479344).

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

7820856 is a wasteful number, since it uses less digits than its factorization.

7820856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5748 (or 5741 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 7820856 is about 2796.5793391213. The cubic root of 7820856 is about 198.4958493465.

The spelling of 7820856 in words is "seven million, eight hundred twenty thousand, eight hundred fifty-six".