7271840 has 48 divisors (see below), whose sum is σ = 17563392. Its totient is φ = 2843904.

The previous prime is 7271839. The next prime is 7271843. The reversal of 7271840 is 481727.

It is not an unprimeable number, because it can be changed into a prime (7271843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7037 + ... + 8003.

It is an arithmetic number, because the mean of its divisors is an integer number (365904).

Almost surely, 2^7271840 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 7271840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8781696).

7271840 is an abundant number, since it is smaller than the sum of its proper divisors (10291552).

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

7271840 is a wasteful number, since it uses less digits than its factorization.

7271840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 7271840 is about 2696.6349400688. The cubic root of 7271840 is about 193.7379819115.

The spelling of 7271840 in words is "seven million, two hundred seventy-one thousand, eight hundred forty".