5540240 has 40 divisors (see below), whose sum is σ = 13445568. Its totient is φ = 2119040.

The previous prime is 5540239. The next prime is 5540243. The reversal of 5540240 is 420455.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (5540243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335 + ... + 3345.

Almost surely, 2^5540240 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 5540240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6722784).

5540240 is an abundant number, since it is smaller than the sum of its proper divisors (7905328).

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

5540240 is a wasteful number, since it uses less digits than its factorization.

5540240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047 (or 3041 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 5540240 is about 2353.7714417505. The cubic root of 5540240 is about 176.9468596791.

Adding to 5540240 its reverse (420455), we get a palindrome (5960695).

The spelling of 5540240 in words is "five million, five hundred forty thousand, two hundred forty".