10820856 has 32 divisors (see below), whose sum is σ = 28229760. Its totient is φ = 3449952.

The previous prime is 10820819. The next prime is 10820881. The reversal of 10820856 is 65802801.

10820856 = T₃₄ + T₃₅ + ... + T₄₀₁.

10820856 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9250 + ... + 10353.

It is an arithmetic number, because the mean of its divisors is an integer number (882180).

Almost surely, 2^10820856 is an apocalyptic number.

It is an amenable number.

10820856 is an abundant number, since it is smaller than the sum of its proper divisors (17408904).

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

10820856 is a wasteful number, since it uses less digits than its factorization.

10820856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19635 (or 19631 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 10820856 is about 3289.5069539370. The cubic root of 10820856 is about 221.1840839101.

The spelling of 10820856 in words is "ten million, eight hundred twenty thousand, eight hundred fifty-six".