7880240 has 40 divisors (see below), whose sum is σ = 18480960. Its totient is φ = 3124736.

The previous prime is 7880239. The next prime is 7880251. The reversal of 7880240 is 420887.

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

It is a zygodrome in base 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10601 + ... + 11319.

It is an arithmetic number, because the mean of its divisors is an integer number (462024).

Almost surely, 2^7880240 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 7880240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9240480).

7880240 is an abundant number, since it is smaller than the sum of its proper divisors (10600720).

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

7880240 is a wasteful number, since it uses less digits than its factorization.

7880240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 863 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 7880240 is about 2807.1765174281. The cubic root of 7880240 is about 198.9969781449.

The spelling of 7880240 in words is "seven million, eight hundred eighty thousand, two hundred forty".