2117320 has 32 divisors (see below), whose sum is σ = 4878720. Its totient is φ = 826560.

The previous prime is 2117317. The next prime is 2117321. The reversal of 2117320 is 237112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2117294 and 2117303.

It is not an unprimeable number, because it can be changed into a prime (2117321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1105 + ... + 2335.

It is an arithmetic number, because the mean of its divisors is an integer number (152460).

2^2117320 is an apocalyptic number.

2117320 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 2117320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2439360).

2117320 is an abundant number, since it is smaller than the sum of its proper divisors (2761400).

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

2117320 is a wasteful number, since it uses less digits than its factorization.

2117320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285 (or 1281 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 2117320 is about 1455.1013710391. The cubic root of 2117320 is about 128.4090106674.

The spelling of 2117320 in words is "two million, one hundred seventeen thousand, three hundred twenty".