820010915 has 32 divisors (see below), whose sum is σ = 1037352960. Its totient is φ = 621504000.

The previous prime is 820010887. The next prime is 820010953. The reversal of 820010915 is 519010028.

It is a happy number.

820010915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 820010915 - 2¹⁰ = 820009891 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2044715 + ... + 2045115.

It is an arithmetic number, because the mean of its divisors is an integer number (32417280).

Almost surely, 2^820010915 is an apocalyptic number.

820010915 is a deficient number, since it is larger than the sum of its proper divisors (217342045).

820010915 is a wasteful number, since it uses less digits than its factorization.

820010915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 820010915 is about 28635.8327100855. The cubic root of 820010915 is about 935.9943152764.

The spelling of 820010915 in words is "eight hundred twenty million, ten thousand, nine hundred fifteen".