10399805 has 16 divisors (see below), whose sum is σ = 13525680. Its totient is φ = 7630848.

The previous prime is 10399793. The next prime is 10399811. The reversal of 10399805 is 50899301.

It can be written as a sum of positive squares in 8 ways, for example, as 1315609 + 9084196 = 1147^2 + 3014^2 .

It is a cyclic number.

It is not a de Polignac number, because 10399805 - 2⁴ = 10399789 is a prime.

It is a nialpdrome in base 15.

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 15 ways as a sum of consecutive naturals, for example, 12131 + ... + 12959.

It is an arithmetic number, because the mean of its divisors is an integer number (845355).

Almost surely, 2^10399805 is an apocalyptic number.

It is an amenable number.

10399805 is a deficient number, since it is larger than the sum of its proper divisors (3125875).

10399805 is a wasteful number, since it uses less digits than its factorization.

10399805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 10399805 is about 3224.8728657111. The cubic root of 10399805 is about 218.2772123626.

The spelling of 10399805 in words is "ten million, three hundred ninety-nine thousand, eight hundred five".