10820815 has 8 divisors (see below), whose sum is σ = 13014000. Its totient is φ = 8637312.

The previous prime is 10820809. The next prime is 10820819. The reversal of 10820815 is 51802801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10820815 - 2³ = 10820807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10820815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10820819) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 327 + ... + 4663.

It is an arithmetic number, because the mean of its divisors is an integer number (1626750).

Almost surely, 2^10820815 is an apocalyptic number.

10820815 is a deficient number, since it is larger than the sum of its proper divisors (2193185).

10820815 is an equidigital number, since it uses as much as digits as its factorization.

10820815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4841.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 10820815 is about 3289.5007219941. The cubic root of 10820815 is about 221.1838045558.

It can be divided in two parts, 1082081 and 5, that multiplied together give a triangular number (5410405 = T₃₂₈₉).

The spelling of 10820815 in words is "ten million, eight hundred twenty thousand, eight hundred fifteen".