3551040240 has 240 divisors, whose sum is σ = 12813492384. Its totient is φ = 810106880.

The previous prime is 3551040239. The next prime is 3551040263. The reversal of 3551040240 is 420401553.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 3551040240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 490084 + ... + 497276.

Almost surely, 2^3551040240 is an apocalyptic number.

3551040240 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 3551040240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6406746192).

3551040240 is an abundant number, since it is smaller than the sum of its proper divisors (9262452144).

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

3551040240 is a wasteful number, since it uses less digits than its factorization.

3551040240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7248 (or 7231 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 3551040240 is about 59590.6052998289. The cubic root of 3551040240 is about 1525.6392897931.

Adding to 3551040240 its reverse (420401553), we get a palindrome (3971441793).

The spelling of 3551040240 in words is "three billion, five hundred fifty-one million, forty thousand, two hundred forty".