2176864 has 24 divisors (see below), whose sum is σ = 4362120. Its totient is φ = 1069056.

The previous prime is 2176843. The next prime is 2176871. The reversal of 2176864 is 4686712.

2176864 = 152² + 153² + ... + 215².

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 7 + 6³ + 8⁵ + 6⁶ + 4³ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312 + ... + 2464.

It is an arithmetic number, because the mean of its divisors is an integer number (181755).

2^2176864 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 2176864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2181060).

2176864 is an abundant number, since it is smaller than the sum of its proper divisors (2185256).

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

2176864 is a wasteful number, since it uses less digits than its factorization.

2176864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222 (or 1214 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 2176864 is about 1475.4199402204. The cubic root of 2176864 is about 129.6016206676.

The spelling of 2176864 in words is "two million, one hundred seventy-six thousand, eight hundred sixty-four".