10399726 has 32 divisors (see below), whose sum is σ = 17475840. Its totient is φ = 4618944.

The previous prime is 10399723. The next prime is 10399751. The reversal of 10399726 is 62799301.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10399723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63721 + ... + 63883.

It is an arithmetic number, because the mean of its divisors is an integer number (546120).

Almost surely, 2^10399726 is an apocalyptic number.

10399726 is a deficient number, since it is larger than the sum of its proper divisors (7076114).

10399726 is a wasteful number, since it uses less digits than its factorization.

10399726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 10399726 is about 3224.8606171430. The cubic root of 10399726 is about 218.2766596617.

It can be divided in two parts, 103 and 99726, that multiplied together give a triangular number (10271778 = T₄₅₃₂).

The spelling of 10399726 in words is "ten million, three hundred ninety-nine thousand, seven hundred twenty-six".