7780980 has 48 divisors (see below), whose sum is σ = 22325184. Its totient is φ = 2023680.

The previous prime is 7780963. The next prime is 7780999. The reversal of 7780980 is 890877.

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, 879 + ... + 4041.

It is an arithmetic number, because the mean of its divisors is an integer number (465108).

Almost surely, 2^7780980 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 7780980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11162592).

7780980 is an abundant number, since it is smaller than the sum of its proper divisors (14544204).

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

7780980 is a wasteful number, since it uses less digits than its factorization.

7780980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216 (or 3214 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 7780980 is about 2789.4408041756. The cubic root of 7780980 is about 198.1579191122.

The spelling of 7780980 in words is "seven million, seven hundred eighty thousand, nine hundred eighty".