7155980 has 48 divisors (see below), whose sum is σ = 17146080. Its totient is φ = 2485248.

The previous prime is 7155977. The next prime is 7155983. The reversal of 7155980 is 895517.

It is an interprime number because it is at equal distance from previous prime (7155977) and next prime (7155983).

It is a self number, because there is not a number n which added to its sum of digits gives 7155980.

It is not an unprimeable number, because it can be changed into a prime (7155983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3611 + ... + 5229.

It is an arithmetic number, because the mean of its divisors is an integer number (357210).

Almost surely, 2^7155980 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 7155980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8573040).

7155980 is an abundant number, since it is smaller than the sum of its proper divisors (9990100).

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

7155980 is a wasteful number, since it uses less digits than its factorization.

7155980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658 (or 1656 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 7155980 is about 2675.0663543172. The cubic root of 7155980 is about 192.7035458725.

The spelling of 7155980 in words is "seven million, one hundred fifty-five thousand, nine hundred eighty".