5545440 has 72 divisors (see below), whose sum is σ = 18928728. Its totient is φ = 1478400.

The previous prime is 5545439. The next prime is 5545447. The reversal of 5545440 is 445455.

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5545447) 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 11 ways as a sum of consecutive naturals, for example, 486 + ... + 3365.

It is an arithmetic number, because the mean of its divisors is an integer number (262899).

Almost surely, 2^5545440 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 5545440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9464364).

5545440 is an abundant number, since it is smaller than the sum of its proper divisors (13383288).

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

5545440 is a wasteful number, since it uses less digits than its factorization.

5545440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3872 (or 3861 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 5545440 is about 2354.8757929029. The cubic root of 5545440 is about 177.0022024048.

The spelling of 5545440 in words is "five million, five hundred forty-five thousand, four hundred forty".