5645904 has 120 divisors (see below), whose sum is σ = 17359008. Its totient is φ = 1566720.

The previous prime is 5645903. The next prime is 5645911. The reversal of 5645904 is 4095465.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5645903) 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, 152574 + ... + 152610.

Almost surely, 2^5645904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5645904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8679504).

5645904 is an abundant number, since it is smaller than the sum of its proper divisors (11713104).

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

5645904 is a wasteful number, since it uses less digits than its factorization.

5645904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 5645904 is about 2376.1111085132. Note that the first 4 decimals coincide. The cubic root of 5645904 is about 178.0646989483.

The spelling of 5645904 in words is "five million, six hundred forty-five thousand, nine hundred four".