2917980 has 144 divisors (see below), whose sum is σ = 10090080. Its totient is φ = 677376.

The previous prime is 2917973. The next prime is 2918059. The reversal of 2917980 is 897192.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67839 + ... + 67881.

It is an arithmetic number, because the mean of its divisors is an integer number (70070).

2^2917980 is an apocalyptic number.

2917980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2917980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5045040).

2917980 is an abundant number, since it is smaller than the sum of its proper divisors (7172100).

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

2917980 is a wasteful number, since it uses less digits than its factorization.

2917980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 2917980 is about 1708.2095890142. The cubic root of 2917980 is about 142.8984233084.

The spelling of 2917980 in words is "two million, nine hundred seventeen thousand, nine hundred eighty".