5645406 has 32 divisors (see below), whose sum is σ = 12263328. Its totient is φ = 1722240.

The previous prime is 5645383. The next prime is 5645407. The reversal of 5645406 is 6045465.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5645407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12016 + ... + 12476.

It is an arithmetic number, because the mean of its divisors is an integer number (383229).

Almost surely, 2^5645406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5645406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6131664).

5645406 is an abundant number, since it is smaller than the sum of its proper divisors (6617922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5645406 is a wasteful number, since it uses less digits than its factorization.

5645406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 5645406 is about 2376.0063131229. The cubic root of 5645406 is about 178.0594633635.

Subtracting from 5645406 its sum of digits (30), we obtain a square (5645376 = 2376²).

The spelling of 5645406 in words is "five million, six hundred forty-five thousand, four hundred six".