10400023 has 4 divisors (see below), whose sum is σ = 10641928. Its totient is φ = 10158120.

The previous prime is 10400021. The next prime is 10400029. The reversal of 10400023 is 32000401.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10400023 - 2¹ = 10400021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10399982 and 10400009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10400021) 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 3 ways as a sum of consecutive naturals, for example, 120888 + ... + 120973.

It is an arithmetic number, because the mean of its divisors is an integer number (2660482).

Almost surely, 2^10400023 is an apocalyptic number.

10400023 is a deficient number, since it is larger than the sum of its proper divisors (241905).

10400023 is an equidigital number, since it uses as much as digits as its factorization.

10400023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241904.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 10400023 is about 3224.9066653161. The cubic root of 10400023 is about 218.2787375226.

Adding to 10400023 its reverse (32000401), we get a palindrome (42400424).

The spelling of 10400023 in words is "ten million, four hundred thousand, twenty-three".