3540240 has 160 divisors (see below), whose sum is σ = 13392000. Its totient is φ = 852480.

The previous prime is 3540223. The next prime is 3540247. The reversal of 3540240 is 420453.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3540247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23686 + ... + 23834.

It is an arithmetic number, because the mean of its divisors is an integer number (83700).

Almost surely, 2^3540240 is an apocalyptic number.

3540240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3540240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6696000).

3540240 is an abundant number, since it is smaller than the sum of its proper divisors (9851760).

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

3540240 is a wasteful number, since it uses less digits than its factorization.

3540240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 3540240 is about 1881.5525504221. The cubic root of 3540240 is about 152.4091010747.

Adding to 3540240 its reverse (420453), we get a palindrome (3960693).

The spelling of 3540240 in words is "three million, five hundred forty thousand, two hundred forty".