5405823 has 24 divisors (see below), whose sum is σ = 8327280. Its totient is φ = 3369600.

The previous prime is 5405821. The next prime is 5405837. The reversal of 5405823 is 3285045.

It is not a de Polignac number, because 5405823 - 2¹ = 5405821 is a prime.

It is an Ulam number.

5405823 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5405821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17115 + ... + 17427.

It is an arithmetic number, because the mean of its divisors is an integer number (346970).

Almost surely, 2^5405823 is an apocalyptic number.

5405823 is a deficient number, since it is larger than the sum of its proper divisors (2921457).

5405823 is a wasteful number, since it uses less digits than its factorization.

With its successor (5405824) it forms an eRAP, since the sums of their prime factors are consecutive (439 and 440).

5405823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 5405823 is about 2325.0425802553. The cubic root of 5405823 is about 175.5041029552.

The spelling of 5405823 in words is "five million, four hundred five thousand, eight hundred twenty-three".