5181840 has 80 divisors (see below), whose sum is σ = 17856000. Its totient is φ = 1381248.

The previous prime is 5181829. The next prime is 5181859. The reversal of 5181840 is 481815.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 961 + ... + 3359.

It is an arithmetic number, because the mean of its divisors is an integer number (223200).

Almost surely, 2^5181840 is an apocalyptic number.

5181840 is the 1440-th heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5181840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8928000).

5181840 is an abundant number, since it is smaller than the sum of its proper divisors (12674160).

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

5181840 is a wasteful number, since it uses less digits than its factorization.

5181840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421 (or 2409 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 5181840 is about 2276.3655242513. The cubic root of 5181840 is about 173.0459076047.

The spelling of 5181840 in words is "five million, one hundred eighty-one thousand, eight hundred forty".