10156809 has 24 divisors (see below), whose sum is σ = 15125376. Its totient is φ = 6026400.

The previous prime is 10156799. The next prime is 10156813. The reversal of 10156809 is 90865101.

It is a happy number.

It is not a de Polignac number, because 10156809 - 2⁷ = 10156681 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10156819) 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 23 ways as a sum of consecutive naturals, for example, 37344 + ... + 37614.

It is an arithmetic number, because the mean of its divisors is an integer number (630224).

Almost surely, 2^10156809 is an apocalyptic number.

It is an amenable number.

10156809 is a deficient number, since it is larger than the sum of its proper divisors (4968567).

10156809 is a wasteful number, since it uses less digits than its factorization.

10156809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 10156809 is about 3186.9748979244. The cubic root of 10156809 is about 216.5637494124.

The spelling of 10156809 in words is "ten million, one hundred fifty-six thousand, eight hundred nine".