2116840 has 64 divisors (see below), whose sum is σ = 5520960. Its totient is φ = 721920.

The previous prime is 2116837. The next prime is 2116867. The reversal of 2116840 is 486112.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 7339 + ... + 7621.

It is an arithmetic number, because the mean of its divisors is an integer number (86265).

2^2116840 is an apocalyptic number.

2116840 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 2116840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2760480).

2116840 is an abundant number, since it is smaller than the sum of its proper divisors (3404120).

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

2116840 is a wasteful number, since it uses less digits than its factorization.

2116840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 2116840 is about 1454.9364247279. The cubic root of 2116840 is about 128.3993064212.

It can be divided in two parts, 21 and 16840, that added together give a palindrome (16861).

The spelling of 2116840 in words is "two million, one hundred sixteen thousand, eight hundred forty".