10408821 has 4 divisors (see below), whose sum is σ = 13878432. Its totient is φ = 6939212.

The previous prime is 10408819. The next prime is 10408831. The reversal of 10408821 is 12880401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10408821 - 2¹ = 10408819 is a prime.

It is a super-2 number, since 2×10408821² = 216687109220082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10408791 and 10408800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10408831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1734801 + ... + 1734806.

It is an arithmetic number, because the mean of its divisors is an integer number (3469608).

Almost surely, 2^10408821 is an apocalyptic number.

It is an amenable number.

10408821 is a deficient number, since it is larger than the sum of its proper divisors (3469611).

10408821 is an equidigital number, since it uses as much as digits as its factorization.

10408821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3469610.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 10408821 is about 3226.2704474362. The cubic root of 10408821 is about 218.3402718434.

The spelling of 10408821 in words is "ten million, four hundred eight thousand, eight hundred twenty-one".